50278 + Interview Questions in Physics

1.	A leakage begins in water tank at position P as shown in the figure. The initial gauge pressure (pressure above that of the atmosphere) at P was 5×105 N/m2. If the density of water is 1000 kg/m3, the initial velocity with which water gushes out is approximately.
Answer» A leakage begins in water tank at position $P$ as shown in the figure. The initial gauge pressure (pressure above that of the atmosphere) at $P$ was $5 \times 10^{5} {N/m}^{2}$ . If the density of water is $1000 {kg/m}^{3}$ , the initial velocity with which water gushes out is approximately.

Discussion

2.	What are the merits of Dalton’s atomic theory?
Answer» What are the merits of Dalton’s atomic theory?

Discussion

3.	A block of mass 1 kg is suspended by a string of mass 1 kg length 1 m as shown in figure. Find the tension at the lowest point of the string and force exerted by support on the string. (Take g=10 m/s2)
Answer» A block of mass $1 k g$ is suspended by a string of mass $1 k g$ length $1 m$ as shown in figure. Find the tension at the lowest point of the string and force exerted by support on the string. (Take $g = 10 m / s^{2}$ )

Discussion

4.	Answer the following questions: (a) A magnetic field that varies in magnitude from point to point but has a constant direction (east to west) is set up in a chamber. A charged particle enters the chamber and travels undeflected along a straight path with constant speed. What can you say about the initial velocity of the particle? (b) A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction, and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions with the environment? (c) An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. Specify the direction in which a uniform magnetic field should be set up to prevent the electron from deflecting from its straight line path.
Answer» Answer the following questions: (a) A magnetic field that varies in magnitude from point to point but has a constant direction (east to west) is set up in a chamber. A charged particle enters the chamber and travels undeflected along a straight path with constant speed. What can you say about the initial velocity of the particle? (b) A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction, and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions with the environment? (c) An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. Specify the direction in which a uniform magnetic field should be set up to prevent the electron from deflecting from its straight line path.

Discussion

5.	The electric field at 2R from the centre of a uniformly charged non conducting sphere of radius R is E. The electric field at a dis†an ce R/2 from the centre will be
Answer» The electric field at 2R from the centre of a uniformly charged non conducting sphere of radius R is E. The electric field at a dis†an ce R/2 from the centre will be

Discussion

6.	10. Which of the following is state variable 1. Temperature 2. Volume 3. Pressure 4. Heat
Answer» 10. Which of the following is state variable 1. Temperature 2. Volume 3. Pressure 4. Heat

Discussion

7.	Voltmeter v1 and v2 are connected in series across a d.c. line. V1 reads 80 V and has a per volt resistance of 200 ohm. V2 has a total resistance of 32kohm. The line voltage is 1) 120 V 2) 160 V 3) 220 V 4) 240 V
Answer» Voltmeter v1 and v2 are connected in series across a d.c. line. V1 reads 80 V and has a per volt resistance of 200 ohm. V2 has a total resistance of 32kohm. The line voltage is 1) 120 V 2) 160 V 3) 220 V 4) 240 V

Discussion

8.	A charged particle of specific charge α is released from origin at time t=0 with velocity →v=v0(^i+^j) in magnetic field →B=B0 ^i. The coordinate of the particle at time t=πB0α will be
Answer» A charged particle of specific charge $α$ is released from origin at time $t = 0$ with velocity $\to v = v_{0} (^i +^j)$ in magnetic field $\to B = B_{0}^i$ . The coordinate of the particle at time $t = \frac{π}{B_{0} α}$ will be

Discussion

9.	Identify the logic gate
Answer» Identify the logic gate

Discussion

10.	a tuning fork A of frequency 512Hz produces 5 beats per second when sounded with another tuning fork B of unknown frequency . if B is loaded with wax the number of beats is again 5 per sec . the frequency of the uning fork B before it was loaded is
Answer» a tuning fork A of frequency 512Hz produces 5 beats per second when sounded with another tuning fork B of unknown frequency . if B is loaded with wax the number of beats is again 5 per sec . the frequency of the uning fork B before it was loaded is

Discussion

11.	Why in LR circuit we are able to apply Kirchoff voltage law as it works in conservative field but in LR circuit we also have induced electric Field which is non conservative in nature so why Kirchoff voltage law works in LR circuit?
Answer» Why in LR circuit we are able to apply Kirchoff voltage law as it works in conservative field but in LR circuit we also have induced electric Field which is non conservative in nature so why Kirchoff voltage law works in LR circuit?

Discussion

12.	When 6 identical cells of no internal resistance are connected in series in the secondary circuit of a potentiometer, the balancing length is l, balancing length becomes l3 when some cells are connected wrongly are
Answer» When $6$ identical cells of no internal resistance are connected in series in the secondary circuit of a potentiometer, the balancing length is $l$ , balancing length becomes $\frac{l}{3}$ when some cells are connected wrongly are

Discussion

13.	An insect moves along a circular path of radius 1 m with a constant speed. If it takes 2 minutes to move from a point on the path to the diametrically opposite point, then find the magnitude of the average velocity of the insect.
Answer» An insect moves along a circular path of radius $1 m$ with a constant speed. If it takes $2$ minutes to move from a point on the path to the diametrically opposite point, then find the magnitude of the average velocity of the insect.

Discussion

14.	84. Force exerted by a charged particle q1 on another charged particle q2 depend upon the medium between them?
Answer» 84. Force exerted by a charged particle q1 on another charged particle q2 depend upon the medium between them?

Discussion

15.	If transmissive power of a surface is 14 and reflective power is 16, then its emissivity will be
Answer» If transmissive power of a surface is $\frac{1}{4}$ and reflective power is $\frac{1}{6},$ then its emissivity will be

Discussion

16.	68. Identical metal plates are located in air at equal distance d� from one another as shown in figure.The area of each plate is A.Find the capacitance of the system between ponts P and Q ,if plates are interconnected as shown
Answer» 68. Identical metal plates are located in air at equal distance d� from one another as shown in figure.The area of each plate is A.Find the capacitance of the system between ponts P and Q ,if plates are interconnected as shown

Discussion

17.	If v=(4t2+5t+1) m/s is the expression according to which the velocity of a particle varies, then the expression for instantaneous displacement at any time t will be (Assume s=0 at t=0)
Answer» If $v = (4 t^{2} + 5 t + 1) m / s$ is the expression according to which the velocity of a particle varies, then the expression for instantaneous displacement at any time $t$ will be (Assume $s = 0$ at $t = 0$ )

Discussion

18.	11.A flat glass slab of thickness 6 cm and refractive index 1.5 is placed in front of a plane mirror . An observer is standing behind the glass slab and looking at the mirror . The actual distance of the observer from the mirror is 40 cm . What will be the distance of his image from himself as seen by the observer .
Answer» 11.A flat glass slab of thickness 6 cm and refractive index 1.5 is placed in front of a plane mirror . An observer is standing behind the glass slab and looking at the mirror . The actual distance of the observer from the mirror is 40 cm . What will be the distance of his image from himself as seen by the observer .

Discussion

19.	Why is the spin quantum number of electron is + 1/2 or - 1/2 and not any other numerical term?
Answer» Why is the spin quantum number of electron is + 1/2 or - 1/2 and not any other numerical term?

Discussion

20.	A car start from rest and has an acceleration a=t. A truck is moving with a uniform velocity of 6 m/s. At what distance will the car overtake the truck.( at t=0 both start their motion).
Answer» A car start from rest and has an acceleration a=t. A truck is moving with a uniform velocity of 6 m/s. At what distance will the car overtake the truck.( at t=0 both start their motion).

Discussion

21.	Under isothermal conditions energy E is supplied to a soap bubble of surface tension T and radius r to double the radius of soap bubble. the value of EA) 16πr^2TB) 24πr^2 TC) 8πr^2TD) 12πr^2 T
Answer» Under isothermal conditions energy E is supplied to a soap bubble of surface tension T and radius r to double the radius of soap bubble. the value of E A) 16πr^2T B) 24πr^2 T C) 8πr^2T D) 12πr^2 T

Discussion

22.	electrostatic potential energy explanation
Answer» electrostatic potential energy explanation

Discussion

23.	Find an anti-derivative (or integral) of cos3x by the method of inspection.
Answer» Find an anti-derivative (or integral) of $cos 3 x$ by the method of inspection.

Discussion

24.	(a) A steady current of 2 amperes was passed through two electrolytic cells X and Y connected in series containing electrolytes FeSO4 and ZnSO4 until 2.8g of Fe deposited at the cathode of cell X .How long did the current flow? Calculate the mass of Zn deposited at the cathode of cell Y . ( Molar mass :Fe=56g/mol ,Zn=65.3g/mol ,1 F=96500C/mol) (b) In the plot of molar conductivity (Λm) vs square root of concentration (C)1/2 following curves are obtained for two electrolytes A and B :
Answer» (a) A steady current of 2 amperes was passed through two electrolytic cells X and Y connected in series containing electrolytes $F e S O_{4}$ and $Z n S O_{4}$ until 2.8g of Fe deposited at the cathode of cell X .How long did the current flow? Calculate the mass of Zn deposited at the cathode of cell Y . ( Molar mass :Fe=56g/mol ,Zn=65.3g/mol ,1 F=96500C/mol) (b) In the plot of molar conductivity $(Λ_{m})$ vs square root of concentration $(C)^{1 / 2}$ following curves are obtained for two electrolytes A and B :

Discussion

25.	27. A particle of mass m is thrown at an angle alpha with the vertical with initial velocity u under gravity the angular momentum of the particle about point of projection when at highest point will be
Answer» 27. A particle of mass m is thrown at an angle alpha with the vertical with initial velocity u under gravity the angular momentum of the particle about point of projection when at highest point will be

Discussion

26.	103. A very long bar magnet is placed with its north pole coinciding with the centre of a circular loop carrying an electric current i.The magnetic field due to magnet at a point on the periphery of the wire is B.The radius of the loop is r.The force on the wire is?
Answer» 103. A very long bar magnet is placed with its north pole coinciding with the centre of a circular loop carrying an electric current i.The magnetic field due to magnet at a point on the periphery of the wire is B.The radius of the loop is r.The force on the wire is?

Discussion

27.	A small block of mass 200 g is pressed against a horizontal spring fixed at one end to compress the spring through 5 cm. The spring constant is 100 N/m. The spring is located on a frictionless horizontal plank located at a height of 3 m from the ground. When the block is released, what horizontal distance will it travel (after leaving the plank) before it hits the ground. (Take g=10 m/s2).
Answer» A small block of mass $200 g$ is pressed against a horizontal spring fixed at one end to compress the spring through $5 cm$ . The spring constant is $100 N/m$ . The spring is located on a frictionless horizontal plank located at a height of $3 m$ from the ground. When the block is released, what horizontal distance will it travel (after leaving the plank) before it hits the ground. (Take $g = 10 {m/s}^{2}$ ).

Discussion

28.	Resistance of n resistors each of r Ω, when connected in parallel give an equivalent resistance of R Ω. If these resistance's were connected in series, the combination would have a resistance in Ω, equal to
Answer» Resistance of $n$ resistors each of $r Ω$ , when connected in parallel give an equivalent resistance of $R Ω$ . If these resistance's were connected in series, the combination would have a resistance in $Ω$ , equal to

Discussion

29.	A man of mass M is standing on a plank kept in a box. The plank and box as a whole has mass m. A light string passing over a fixed smooth pulley connects the man and box. If the box remains stationary, find the tension in the string and the force exerted by the man on the plank.
Answer» A man of mass M is standing on a plank kept in a box. The plank and box as a whole has mass m. A light string passing over a fixed smooth pulley connects the man and box. If the box remains stationary, find the tension in the string and the force exerted by the man on the plank.

Discussion

30.	A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10m/s. A plumb bob is suspended from the roof of the car by a light rigid rod of length 10 cm. The angle made by the rod with the vertical is A) zero B)30^° C)45^° D)60^°
Answer» A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10m/s. A plumb bob is suspended from the roof of the car by a light rigid rod of length 10 cm. The angle made by the rod with the vertical is A) zero B)30^° C)45^° D)60^°

Discussion

31.	The linear momentum is described in first law of motion . why?
Answer» The linear momentum is described in first law of motion . why?

Discussion

32.	a particle of mass M is situated at the centre of a shell of same mass and radius a. The gravitational potential at a point situated at a/2 dis†an ce from the centre,will be
Answer» a particle of mass M is situated at the centre of a shell of same mass and radius a. The gravitational potential at a point situated at a/2 dis†an ce from the centre,will be

Discussion

33.	If the ratio of the concentration of electrons to that of holes in a semiconductor is 75 and the ratio of corresponding currents is 74 then what is the ratio of their drift velocities ?
Answer» If the ratio of the concentration of electrons to that of holes in a semiconductor is $\frac{7}{5}$ and the ratio of corresponding currents is $\frac{7}{4}$ then what is the ratio of their drift velocities ?

Discussion

34.	Two charges +3.2×10−19 and −3.2×10−19 C placed 2.4˙A apart form an electric dipole. It is placed in a uniform electric field of intensity 4×105 volt/m. The electric dipole moment is
Answer» Two charges $+ 3.2 \times 10^{- 19}$ and $- 3.2 \times 10^{- 19}$ C placed $2.4 ˙ A$ apart form an electric dipole. It is placed in a uniform electric field of intensity $4 \times 10^{5}$ volt/m. The electric dipole moment is

Discussion

35.	A battery of e.m.f. }15V and internal resistance }3Ω isconnected to two resistors }3Ω and }6Ω connected } in parallel. Find : (a) the current through the battery, } (b) the p.d. between the terminals of the battery, } (c) the current in }3Ω resistor, (d) the current in }6Ω essitor.
Answer» A battery of e.m.f. }15V and internal resistance }3Ω isconnected to two resistors }3Ω and }6Ω connected } in parallel. Find : (a) the current through the battery, } (b) the p.d. between the terminals of the battery, } (c) the current in }3Ω resistor, (d) the current in }6Ω essitor.

Discussion

36.	In order to find time, the astronaut orbiting in an earth satellite should use
Answer» In order to find time, the astronaut orbiting in an earth satellite should use

Discussion

37.	The work done by an external agent in stretching a spring of force constant K from length l to 3l is
Answer» The work done by an external agent in stretching a spring of force constant $K$ from length $l$ to $3 l$ is

Discussion

38.	Particle is projected with speed 5√2 m/s at an angle of projection 45∘ from horizontal. At maximum height it breaks in two identical particle, velocity of one particle is zero, find out distance (in m) of second particle from point of projection when it hits ground. Take g=10 m/s2
Answer» Particle is projected with speed $5 \sqrt{2} m/s$ at an angle of projection $45^{\circ}$ from horizontal. At maximum height it breaks in two identical particle, velocity of one particle is zero, find out distance (in $m$ ) of second particle from point of projection when it hits ground. Take $g = 10 {m/s}^{2}$

Discussion

39.	a point charge q is placed at the corner of a cube with side l find flux through entire surface and flux through each face
Answer» a point charge q is placed at the corner of a cube with side l find flux through entire surface and flux through each face

Discussion

40.	A person is painting has house walls. He stands on a ladder with a bucket containing paint in one hand and a brush in other. Suddenly the bucket slips from his hand and falls down on the floor. If the bucket with the paint had a mass of 6.0 kg and was at a height of 2.0 m at the time it slipped, how much gravitational potential energy is lost together with the paint ?
Answer» A person is painting has house walls. He stands on a ladder with a bucket containing paint in one hand and a brush in other. Suddenly the bucket slips from his hand and falls down on the floor. If the bucket with the paint had a mass of 6.0 kg and was at a height of 2.0 m at the time it slipped, how much gravitational potential energy is lost together with the paint ?

Discussion

41.	After the break down voltage in case of reverse biasing what is the direction of the flow of holes and electrons??
Answer» After the break down voltage in case of reverse biasing what is the direction of the flow of holes and electrons??

Discussion

42.	Find the charge through capacitor C3 in the given circuit?
Answer» Find the charge through capacitor $C_{3}$ in the given circuit?

Discussion

43.	In resonance tube experiment we find l1=25 cm and l2=75 cm. The least count of the scale used to measure l is 0.1 cm. If there is no error in frequency. What will be the maximum permissiable error in speed of sound. (Take f0=325 Hz )
Answer» In resonance tube experiment we find $l_{1} = 25 cm and l_{2} = 75 cm$ . The least count of the scale used to measure $l$ is $0.1 cm$ . If there is no error in frequency. What will be the maximum permissiable error in speed of sound. (Take $f_{0} = 325 Hz$ )

Discussion

44.	23 A horizontal rod of length L is moved with constantvelocity v, perpendicular to length, towards east thehorizontal component of earth's magnetic field is Band angle of dip is 8. The induced emf in the, rod is(4) BoLvtan 8RXBOLV cos 8(3) BOLV cot(4)B Lv sin(Space for R
Answer» 23 A horizontal rod of length L is moved with constantvelocity v, perpendicular to length, towards east thehorizontal component of earth's magnetic field is Band angle of dip is 8. The induced emf in the, rod is(4) BoLvtan 8RXBOLV cos 8(3) BOLV cot(4)B Lv sin(Space for R

Discussion

45.	what is dual reflection of light ? who discovered it ? what was the fight between the scientists
Answer» what is dual reflection of light ? who discovered it ? what was the fight between the scientists

Discussion

46.	A body of mass m is launched up a rough inclined plane of angle 45∘ with the horizontal. If the time of ascent is half the time of descent, the coefficient of friction is
Answer» A body of mass $m$ is launched up a rough inclined plane of angle $45^{\circ}$ with the horizontal. If the time of ascent is half the time of descent, the coefficient of friction is

Discussion

47.	201024. In an experiment, 4 g of M2O, oxide was reduced to2.8 g of the metal. If the atomic mass of the metal is56 g mol-, the number of O atoms in the oxide i(a) 1(c) 3(b) 2(d) 4(AFMC)
Answer» 201024. In an experiment, 4 g of M2O, oxide was reduced to2.8 g of the metal. If the atomic mass of the metal is56 g mol-, the number of O atoms in the oxide i(a) 1(c) 3(b) 2(d) 4(AFMC)

Discussion

48.	As a wave propagates (i)The wave intensity remains constant for a plane wave. (ii)The wave intensity changes inversely as the square of the distance from the source for a spherical wave. (iii) The intensity of the spherical wave or at any spherical surface centered at source remains the same at all times. The correct statement(s) is/are
Answer» As a wave propagates (i)The wave intensity remains constant for a plane wave. (ii)The wave intensity changes inversely as the square of the distance from the source for a spherical wave. (iii) The intensity of the spherical wave or at any spherical surface centered at source remains the same at all times. The correct statement(s) is/are

48.

As a wave propagates (i)The wave intensity remains constant for a plane wave. (ii)The wave intensity changes inversely as the square of the distance from the source for a spherical wave. (iii) The intensity of the spherical wave or at any spherical surface centered at source remains the same at all times. The correct statement(s) is/are

Answer»

As a wave propagates

(i)The wave intensity remains constant for a plane wave.

(ii)The wave intensity changes inversely as the square of the distance from the source for a spherical wave.

(iii) The intensity of the spherical wave or at any spherical surface centered at source remains the same at all times.

The correct statement(s) is/are

Discussion

49.	A sample of aluminium has a mass of 54.0 g. What is the mass of the same number of magnesium atoms?(Atomic weight of Al=27 u, Mg=24 u)
Answer» A sample of aluminium has a mass of $54.0 g$ . What is the mass of the same number of magnesium atoms? (Atomic weight of $A l = 27 u, M g = 24 u$ )

Discussion

50.	Two carts on horizontal straight rails are pushed apart by an explosion of a point charge Q placed between the carts. Suppose the coefficient of friction of the two are equal and 200 kg cart travels a distance of 36 m and stops. The distance covered by the cart weighing 300 kg is
Answer» Two carts on horizontal straight rails are pushed apart by an explosion of a point charge $Q$ placed between the carts. Suppose the coefficient of friction of the two are equal and $200 kg$ cart travels a distance of $36 m$ and stops. The distance covered by the cart weighing $300 kg$ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A leakage begins in water tank at position P as shown in the figure. The initial gauge pressure (pressure above that of the atmosphere) at P was 5×105 N/m2. If the density of water is 1000 kg/m3, the initial velocity with which water gushes out is approximately.

What are the merits of Dalton’s atomic theory?

A block of mass 1 kg is suspended by a string of mass 1 kg length 1 m as shown in figure. Find the tension at the lowest point of the string and force exerted by support on the string. (Take g=10 m/s2)

The electric field at 2R from the centre of a uniformly charged non conducting sphere of radius R is E. The electric field at a dis†an ce R/2 from the centre will be

10. Which of the following is state variable 1. Temperature 2. Volume 3. Pressure 4. Heat

Voltmeter v1 and v2 are connected in series across a d.c. line. V1 reads 80 V and has a per volt resistance of 200 ohm. V2 has a total resistance of 32kohm. The line voltage is 1) 120 V 2) 160 V 3) 220 V 4) 240 V

A charged particle of specific charge α is released from origin at time t=0 with velocity →v=v0(^i+^j) in magnetic field →B=B0 ^i. The coordinate of the particle at time t=πB0α will be

Identify the logic gate

a tuning fork A of frequency 512Hz produces 5 beats per second when sounded with another tuning fork B of unknown frequency . if B is loaded with wax the number of beats is again 5 per sec . the frequency of the uning fork B before it was loaded is

Why in LR circuit we are able to apply Kirchoff voltage law as it works in conservative field but in LR circuit we also have induced electric Field which is non conservative in nature so why Kirchoff voltage law works in LR circuit?

When 6 identical cells of no internal resistance are connected in series in the secondary circuit of a potentiometer, the balancing length is l, balancing length becomes l3 when some cells are connected wrongly are

An insect moves along a circular path of radius 1 m with a constant speed. If it takes 2 minutes to move from a point on the path to the diametrically opposite point, then find the magnitude of the average velocity of the insect.

84. Force exerted by a charged particle q1 on another charged particle q2 depend upon the medium between them?

If transmissive power of a surface is 14 and reflective power is 16, then its emissivity will be

68. Identical metal plates are located in air at equal distance d� from one another as shown in figure.The area of each plate is A.Find the capacitance of the system between ponts P and Q ,if plates are interconnected as shown

If v=(4t2+5t+1) m/s is the expression according to which the velocity of a particle varies, then the expression for instantaneous displacement at any time t will be (Assume s=0 at t=0)

Why is the spin quantum number of electron is + 1/2 or - 1/2 and not any other numerical term?

A car start from rest and has an acceleration a=t. A truck is moving with a uniform velocity of 6 m/s. At what distance will the car overtake the truck.( at t=0 both start their motion).

Under isothermal conditions energy E is supplied to a soap bubble of surface tension T and radius r to double the radius of soap bubble. the value of EA) 16πr^2TB) 24πr^2 TC) 8πr^2TD) 12πr^2 T

electrostatic potential energy explanation

Find an anti-derivative (or integral) of cos3x by the method of inspection.

27. A particle of mass m is thrown at an angle alpha with the vertical with initial velocity u under gravity the angular momentum of the particle about point of projection when at highest point will be

103. A very long bar magnet is placed with its north pole coinciding with the centre of a circular loop carrying an electric current i.The magnetic field due to magnet at a point on the periphery of the wire is B.The radius of the loop is r.The force on the wire is?

Resistance of n resistors each of r Ω, when connected in parallel give an equivalent resistance of R Ω. If these resistance's were connected in series, the combination would have a resistance in Ω, equal to

A man of mass M is standing on a plank kept in a box. The plank and box as a whole has mass m. A light string passing over a fixed smooth pulley connects the man and box. If the box remains stationary, find the tension in the string and the force exerted by the man on the plank.

A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10m/s. A plumb bob is suspended from the roof of the car by a light rigid rod of length 10 cm. The angle made by the rod with the vertical is A) zero B)30^° C)45^° D)60^°

The linear momentum is described in first law of motion . why?

a particle of mass M is situated at the centre of a shell of same mass and radius a. The gravitational potential at a point situated at a/2 dis†an ce from the centre,will be

If the ratio of the concentration of electrons to that of holes in a semiconductor is 75 and the ratio of corresponding currents is 74 then what is the ratio of their drift velocities ?

Two charges +3.2×10−19 and −3.2×10−19 C placed 2.4˙A apart form an electric dipole. It is placed in a uniform electric field of intensity 4×105 volt/m. The electric dipole moment is

A battery of e.m.f. }15V and internal resistance }3Ω isconnected to two resistors }3Ω and }6Ω connected } in parallel. Find : (a) the current through the battery, } (b) the p.d. between the terminals of the battery, } (c) the current in }3Ω resistor, (d) the current in }6Ω essitor.

In order to find time, the astronaut orbiting in an earth satellite should use

The work done by an external agent in stretching a spring of force constant K from length l to 3l is

Particle is projected with speed 5√2 m/s at an angle of projection 45∘ from horizontal. At maximum height it breaks in two identical particle, velocity of one particle is zero, find out distance (in m) of second particle from point of projection when it hits ground. Take g=10 m/s2

a point charge q is placed at the corner of a cube with side l find flux through entire surface and flux through each face

After the break down voltage in case of reverse biasing what is the direction of the flow of holes and electrons??

Find the charge through capacitor C3 in the given circuit?

In resonance tube experiment we find l1=25 cm and l2=75 cm. The least count of the scale used to measure l is 0.1 cm. If there is no error in frequency. What will be the maximum permissiable error in speed of sound. (Take f0=325 Hz )

23 A horizontal rod of length L is moved with constantvelocity v, perpendicular to length, towards east thehorizontal component of earth's magnetic field is Band angle of dip is 8. The induced emf in the, rod is(4) BoLvtan 8RXBOLV cos 8(3) BOLV cot(4)B Lv sin(Space for R

what is dual reflection of light ? who discovered it ? what was the fight between the scientists

A body of mass m is launched up a rough inclined plane of angle 45∘ with the horizontal. If the time of ascent is half the time of descent, the coefficient of friction is

201024. In an experiment, 4 g of M2O, oxide was reduced to2.8 g of the metal. If the atomic mass of the metal is56 g mol-, the number of O atoms in the oxide i(a) 1(c) 3(b) 2(d) 4(AFMC)

A sample of aluminium has a mass of 54.0 g. What is the mass of the same number of magnesium atoms?(Atomic weight of Al=27 u, Mg=24 u)

Two carts on horizontal straight rails are pushed apart by an explosion of a point charge Q placed between the carts. Suppose the coefficient of friction of the two are equal and 200 kg cart travels a distance of 36 m and stops. The distance covered by the cart weighing 300 kg is