16569 + Interview Questions in Physics

1.	A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are
Answer» A transformer having efficiency of $90 %$ is working on $200 V$ and $3 kW$ power supply. If the current in the secondary coil is $6 A$ , the voltage across the secondary coil and the current in the primary coil respectively are

Discussion

2.	A conducting cycle wheel, with each spoke of length l, is rotating about its geometrical axis, with uniform angular velocity ω, in a uniform magnetic field as shown in the figure. If the number of spokes are N, then calculate the induced emf between the center and the rim of the wheel.
Answer» A conducting cycle wheel, with each spoke of length $l$ , is rotating about its geometrical axis, with uniform angular velocity $ω$ , in a uniform magnetic field as shown in the figure. If the number of spokes are $N$ , then calculate the induced emf between the center and the rim of the wheel.

Discussion

3.	Answer the following questions: (a) Long distance radio broadcasts use short-wave bands. Why? (b) It is necessary to use satellites for long distance TV transmission. Why? (c) Optical and radiotelescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth.Why? (d) The small ozone layer on top of the stratosphere is crucial for human survival. Why? (e) If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now? (f ) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?
Answer» Answer the following questions: (a) Long distance radio broadcasts use short-wave bands. Why? (b) It is necessary to use satellites for long distance TV transmission. Why? (c) Optical and radiotelescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth.Why? (d) The small ozone layer on top of the stratosphere is crucial for human survival. Why? (e) If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now? (f ) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?

Discussion

4.	An electric bulb marked 25 W and 100 V is connected across 50 V supply. Now its power is
Answer» An electric bulb marked 25 W and 100 V is connected across 50 V supply. Now its power is

Discussion

5.	If x, y and z are the lengths of the emitter, base and collector of a transistor respectively then:
Answer» If $x, y$ and $z$ are the lengths of the emitter, base and collector of a transistor respectively then:

Discussion

6.	A wire of length L and cross section area A is made of a material of Young's modulus Y. If the wire is stretched by an amount x, the work done is
Answer» A wire of length L and cross section area A is made of a material of Young's modulus Y. If the wire is stretched by an amount x, the work done is

Discussion

7.	Give reasons.(1) The sky appears dark instead of blue to a person located in space.(2) Stars twinkle at night.(3) The sun appears reddish early in the morning.(4) It is possible to enjoy a rainbow at fountains in any season.
Answer» Give reasons. (1) The sky appears dark instead of blue to a person located in space. (2) Stars twinkle at night. (3) The sun appears reddish early in the morning. (4) It is possible to enjoy a rainbow at fountains in any season.

7.

Give reasons.(1) The sky appears dark instead of blue to a person located in space.(2) Stars twinkle at night.(3) The sun appears reddish early in the morning.(4) It is possible to enjoy a rainbow at fountains in any season.

Answer»

Give reasons.

(1) The sky appears dark instead of blue to a person located in space.

(2) Stars twinkle at night.

(3) The sun appears reddish early in the morning.

(4) It is possible to enjoy a rainbow at fountains in any season.

Discussion

8.	what is the direction of flow of current
Answer» what is the direction of flow of current

Discussion

9.	Derive the resistance in parallel circuit relation:Delta R/R^2 = delta R1/R1^2 + delta R2/R2^2
Answer» Derive the resistance in parallel circuit relation: Delta R/R^2 = delta R1/R1^2 + delta R2/R2^2

Discussion

10.	93. A ray of light incidents on a refracting surface at 30 degrees with the surface . If the angle of refraction is 45 degrees ,refractive index of the medium is ?
Answer» 93. A ray of light incidents on a refracting surface at 30 degrees with the surface . If the angle of refraction is 45 degrees ,refractive index of the medium is ?

Discussion

11.	A 0.5Kg of ball is thrown up with an initial speed of 14m/s and reaches a maximum height of8.0m. How much energy is dissipated by air drag acting on balll durng the ascent? (1)19.6J (2)4.9J (3)10J (4)9.8J
Answer» A 0.5Kg of ball is thrown up with an initial speed of 14m/s and reaches a maximum height of8.0m. How much energy is dissipated by air drag acting on balll durng the ascent? (1)19.6J (2)4.9J (3)10J (4)9.8J

Discussion

12.	An object is approaching a convex mirror at a cons†an t speed. Comment on the speed of the image fermed. Also draw the graph between v and u
Answer» An object is approaching a convex mirror at a cons†an t speed. Comment on the speed of the image fermed. Also draw the graph between v and u

Discussion

13.	The period of simple harmonic oscillator is 24 sec and the initial phase is zero. The time at which the oscillating particle would have attained half the amplitude
Answer» The period of simple harmonic oscillator is 24 sec and the initial phase is zero. The time at which the oscillating particle would have attained half the amplitude

Discussion

14.	Two cars are approaching each other at an equal speed of 7.2 km/hr. When they see each other, both blow horns having frequency of 676Hz. The beat frequency heard by each driver will be Hz.[Velocity of sound in air is 340m/s]
Answer» Two cars are approaching each other at an equal speed of $7.2 km/hr$ . When they see each other, both blow horns having frequency of $676 Hz$ . The beat frequency heard by each driver will be $Hz$ . [Velocity of sound in air is $340 m/s$ ]

Discussion

15.	A girl having mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4ms−1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?
Answer» A girl having mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of $4 m s^{- 1}$ by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?

Discussion

16.	What is the formula for magnetic flux?
Answer» What is the formula for magnetic flux?

Discussion

17.	A prism of refractive index √2 has a prism angle of 60∘. At what angle must a ray be incident on it so that it suffers a minimum deviation?
Answer» A prism of refractive index $\sqrt{2}$ has a prism angle of $60^{\circ}$ . At what angle must a ray be incident on it so that it suffers a minimum deviation?

Discussion

18.	When the current I in electric circuit is tripled, the heat energy H generated becomes __ the original heat energy generated.
Answer» When the current I in electric circuit is tripled, the heat energy H generated becomes __ the original heat energy generated.

Discussion

19.	What are the advantages of wind energy?
Answer» What are the advantages of wind energy?

Discussion

20.	State whether an electric heater will consume more electrical energy or less electrical energy per second when the length of its heating element is reduced. Give reasons for your answers.
Answer» State whether an electric heater will consume more electrical energy or less electrical energy per second when the length of its heating element is reduced. Give reasons for your answers.

Discussion

21.	an object is performing damped oscillations . a force of magnitude F=F cos(wt) is applied on the object . Displacement amplitude is maximum when(1)w is slightly greater than natural frequency(2)w is slightly lesser than natural frequency (3)w is equal to natural frequency(4)all of these
Answer» an object is performing damped oscillations . a force of magnitude F=F cos(wt) is applied on the object . Displacement amplitude is maximum when (1)w is slightly greater than natural frequency (2)w is slightly lesser than natural frequency (3)w is equal to natural frequency (4)all of these

Discussion

22.	Alex of mass 40 kg is standing at a cliff of height 15 m while his friend Sam of mass 50 kg is standing at another cliff of height 7 m. Who among them has greater potential energy?Take g = 10 ms−2.
Answer» Alex of mass 40 kg is standing at a cliff of height 15 m while his friend Sam of mass 50 kg is standing at another cliff of height 7 m. Who among them has greater potential energy? Take g = 10 ms $^{- 2}$ .

Discussion

23.	The equivalent resistance between the points A & B in the circuit is:
Answer» The equivalent resistance between the points A & B in the circuit is:

Discussion

24.	In the network shown in the figure, all resistors are identical with R = 300 Ω. The resistance Rab (in Ω) of the network is R=300 Ω100
Answer» In the network shown in the figure, all resistors are identical with R = 300 $Ω$ . The resistance $R_{a b}$ (in $Ω$ ) of the network is $R = 300 Ω$ 100

24.

In the network shown in the figure, all resistors are identical with R = 300 Ω. The resistance Rab (in Ω) of the network is R=300 Ω100

Answer»

In the network shown in the figure, all resistors are identical with R = 300 $Ω$ . The resistance $R_{a b}$ (in $Ω$ ) of the network is

$R = 300 Ω$

100

Discussion

25.	The three types of chemical weapons used by the US during the Vietnam conflict are as listed below:
Answer» The three types of chemical weapons used by the US during the Vietnam conflict are as listed below:

Discussion

26.	A beam of light is traveling from Region I to Region IV (refer figure). The refractive index of Region I, II, III and IV are n0,n02,n06andn08 respectively. The angle of incidence θ for which the beam just misses entering Region IV is:
Answer» A beam of light is traveling from Region I to Region IV (refer figure). The refractive index of Region I, II, III and IV are $n_{0}, \frac{n_{0}}{2}, \frac{n_{0}}{6} a n d \frac{n_{0}}{8}$ respectively. The angle of incidence $θ$ for which the beam just misses entering Region IV is:

Discussion

27.	Find the angle between the ray emergent ray and incident ray when the light goes from air to glass slab. Given μglass = 1.5
Answer» Find the angle between the ray emergent ray and incident ray when the light goes from air to glass slab. Given $μ_{g l a s s}$ = 1.5

27.

Find the angle between the ray emergent ray and incident ray when the light goes from air to glass slab. Given μglass = 1.5

Answer»

Find the angle between the ray emergent ray and incident ray when the light goes from air to glass slab. Given $μ_{g l a s s}$ = 1.5

Discussion

28.	Why do different colors deviate at different angles when passing through a prism?
Answer» Why do different colors deviate at different angles when passing through a prism?

Discussion

29.	Which of the following is not one of the prime health risks associated with greater UV-radiation due to depletion of stratosphere ozone ?
Answer» Which of the following is not one of the prime health risks associated with greater UV-radiation due to depletion of stratosphere ozone ?

Discussion

30.	A solid current carrying conductor of radius R is having current per unit area J=α r/R where α is a cons†an t and r is the dis†an ce from the axis. Find magnetic field at dis†an ce x from the axis of wire. Assume x>R
Answer» A solid current carrying conductor of radius R is having current per unit area J=α r/R where α is a cons†an t and r is the dis†an ce from the axis. Find magnetic field at dis†an ce x from the axis of wire. Assume x>R

Discussion

31.	The diagram in Fig. 9.28 shows three lamps and three switches 1, 2 and 3 connected with two cells. (a) Name the switch/ switches to be closed so as to light all the three lamps. (b) How are then the lamps connected : in series or in parallel ? Fig ; 9.28
Answer» The diagram in Fig. 9.28 shows three lamps and three switches 1, 2 and 3 connected with two cells. (a) Name the switch/ switches to be closed so as to light all the three lamps. (b) How are then the lamps connected : in series or in parallel ? Fig ; 9.28

31.

The diagram in Fig. 9.28 shows three lamps and three switches 1, 2 and 3 connected with two cells. (a) Name the switch/ switches to be closed so as to light all the three lamps. (b) How are then the lamps connected : in series or in parallel ? Fig ; 9.28

Answer»

The diagram in Fig. 9.28 shows three lamps and three switches 1, 2 and 3 connected with two cells.

(a) Name the switch/ switches to be closed so as to light all the three lamps.

(b) How are then the lamps connected : in series or in parallel ?

Fig ; 9.28

Discussion

32.	Calculate the PD that should be applied across a wire of 10Ω resistance so as to pass a current of 50mA through it. Calculate the value of charge that will flow through the wire in 1 minute.
Answer» Calculate the PD that should be applied across a wire of 10Ω resistance so as to pass a current of 50mA through it. Calculate the value of charge that will flow through the wire in 1 minute.

Discussion

33.	ntA certain prism is found to produce a minimum deviation of 38^°. It produces a deviation of 44^° when the angle of incidence is either 42^° or 62^°. What is the angle of incidence when it is undergoing minimum deviationn nt1)45^°n nt2)49^°n nt3)40^°n nt4)55^°n
Answer» ntA certain prism is found to produce a minimum deviation of 38^°. It produces a deviation of 44^° when the angle of incidence is either 42^° or 62^°. What is the angle of incidence when it is undergoing minimum deviationn nt1)45^°n nt2)49^°n nt3)40^°n nt4)55^°n

Discussion

34.	Find equivelent resistance between A and B.
Answer» Find equivelent resistance between $A$ and $B$ .

Discussion

35.	a long wire is carrying a current of 2A into the plane of paper through origin of X-Y plane. find the magnetic field of induction at (3,4)m.
Answer» a long wire is carrying a current of 2A into the plane of paper through origin of X-Y plane. find the magnetic field of induction at (3,4)m.

Discussion

36.	For an incident ray directed towards centre of curvature of a spherical mirror, the reflected ray : (a) retraces its path (b) passes through the focus (c) passes through the pole (d) becomes parallel to the principal axis.
Answer» For an incident ray directed towards centre of curvature of a spherical mirror, the reflected ray : (a) retraces its path (b) passes through the focus (c) passes through the pole (d) becomes parallel to the principal axis.

36.

For an incident ray directed towards centre of curvature of a spherical mirror, the reflected ray : (a) retraces its path (b) passes through the focus (c) passes through the pole (d) becomes parallel to the principal axis.

Answer»

For an incident ray directed towards centre of curvature of a spherical mirror, the reflected ray :

(a) retraces its path

(b) passes through the focus

(c) passes through the pole

(d) becomes parallel to the principal axis.

Discussion

37.	How much energy is transferred when 10 A current flows through a resistor of resistance 5 Ω for time of 30 minutes?
Answer» How much energy is transferred when $10 A$ current flows through a resistor of resistance $5 Ω$ for time of $30 m i n u t e s$ ?

Discussion

38.	39. What percent of air would be expelled from a flask kept at 27 degree celsius on heating it to 477 degree celsius?
Answer» 39. What percent of air would be expelled from a flask kept at 27 degree celsius on heating it to 477 degree celsius?

Discussion

39.	The mass and the diameter of a planet are three times the respective values for the Earth. The period of oscillation of a simple pendulum on the Earth is 2 Sec. The Period of oscillation of the same pendulum on the planet would be:
Answer» The mass and the diameter of a planet are three times the respective values for the Earth. The period of oscillation of a simple pendulum on the Earth is $2 Sec.$ The Period of oscillation of the same pendulum on the planet would be:

Discussion

40.	7.The ratio of magnetic inductions at the center of a circular coil of radius a and on its axis at a distance equal to its radius will be
Answer» 7.The ratio of magnetic inductions at the center of a circular coil of radius a and on its axis at a distance equal to its radius will be

Discussion

41.	One half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.
Answer» One half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.

Discussion

42.	Is it possible to change one element into another element
Answer» Is it possible to change one element into another element

Discussion

43.	Bullet Of 0.03kg mass each Hit a plate At The Rate Of 200 bullets Per second,with velocity of 50m/s and Reflect Back with a Velocity of 30m/s.find the Average force acting On The Plate
Answer» Bullet Of 0.03kg mass each Hit a plate At The Rate Of 200 bullets Per second,with velocity of 50m/s and Reflect Back with a Velocity of 30m/s.find the Average force acting On The Plate

Discussion

44.	An object is placed in front of a convex mirror at 60 m from the mirror. Its radius of curvature is 40 m. The object starts moving towards the mirror at 20 m s−1. Find the average speed of the image after a time interval of 2 seconds?
Answer» An object is placed in front of a convex mirror at $60 m$ from the mirror. Its radius of curvature is $40 m$ . The object starts moving towards the mirror at $20 m s^{- 1}$ . Find the average speed of the image after a time interval of 2 seconds?

Discussion

45.	Question 14 Expand the abbreviation GAP. (a) Governmental Agency for Pollution Control (b) Gross Assimilation by Photosynthesis (c) Ganga Action Plan (d) Governmental Agency for Animal Protection
Answer» Question 14 Expand the abbreviation GAP. (a) Governmental Agency for Pollution Control (b) Gross Assimilation by Photosynthesis (c) Ganga Action Plan (d) Governmental Agency for Animal Protection

Discussion

46.	When a car is in uniform motion along a straight line, then___
Answer» When a car is in uniform motion along a straight line, then___

Discussion

47.	A wire of fixed length is bent to form a coil of one turn. It is again bent to form a coil of three turns. If in both cases same amount of current is passed, then the ratio of the intensities of magnetic field produced at the centre of the coil of one turn and three turns respectively will be,
Answer» A wire of fixed length is bent to form a coil of one turn. It is again bent to form a coil of three turns. If in both cases same amount of current is passed, then the ratio of the intensities of magnetic field produced at the centre of the coil of one turn and three turns respectively will be,

Discussion

48.	The maximum number of electrons in a shell can be calculated by the formula _______.
Answer» The maximum number of electrons in a shell can be calculated by the formula _______.

Discussion

49.	Q.28. An aluminium wire has radius 0.25 mm and length of 75 m. If the resistanceof the wire is 10 Ω , calculate the resistivity of aluminum.
Answer» Q.28. An aluminium wire has radius 0.25 mm and length of 75 m. If the resistanceof the wire is 10 Ω , calculate the resistivity of aluminum.

Discussion

50.	Two short bar magnets A and B are identical and these are arranged as shown in the figure. A magnetic needle is placed between the magnets at point P which gets deflected through an angle θ under the influence of magnets. The ratio of distances d1 and d2 will be.
Answer» Two short bar magnets $A$ and $B$ are identical and these are arranged as shown in the figure. A magnetic needle is placed between the magnets at point $P$ which gets deflected through an angle $θ$ under the influence of magnets. The ratio of distances $d_{1}$ and $d_{2}$ will be.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are

A conducting cycle wheel, with each spoke of length l, is rotating about its geometrical axis, with uniform angular velocity ω, in a uniform magnetic field as shown in the figure. If the number of spokes are N, then calculate the induced emf between the center and the rim of the wheel.

An electric bulb marked 25 W and 100 V is connected across 50 V supply. Now its power is

If x, y and z are the lengths of the emitter, base and collector of a transistor respectively then:

A wire of length L and cross section area A is made of a material of Young's modulus Y. If the wire is stretched by an amount x, the work done is

Give reasons.(1) The sky appears dark instead of blue to a person located in space.(2) Stars twinkle at night.(3) The sun appears reddish early in the morning.(4) It is possible to enjoy a rainbow at fountains in any season.

what is the direction of flow of current

Derive the resistance in parallel circuit relation:Delta R/R^2 = delta R1/R1^2 + delta R2/R2^2

93. A ray of light incidents on a refracting surface at 30 degrees with the surface . If the angle of refraction is 45 degrees ,refractive index of the medium is ?

A 0.5Kg of ball is thrown up with an initial speed of 14m/s and reaches a maximum height of8.0m. How much energy is dissipated by air drag acting on balll durng the ascent? (1)19.6J (2)4.9J (3)10J (4)9.8J

An object is approaching a convex mirror at a cons†an t speed. Comment on the speed of the image fermed. Also draw the graph between v and u

The period of simple harmonic oscillator is 24 sec and the initial phase is zero. The time at which the oscillating particle would have attained half the amplitude

Two cars are approaching each other at an equal speed of 7.2 km/hr. When they see each other, both blow horns having frequency of 676Hz. The beat frequency heard by each driver will be Hz.[Velocity of sound in air is 340m/s]

A girl having mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4ms−1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?

What is the formula for magnetic flux?

A prism of refractive index √2 has a prism angle of 60∘. At what angle must a ray be incident on it so that it suffers a minimum deviation?

When the current I in electric circuit is tripled, the heat energy H generated becomes __ the original heat energy generated.

What are the advantages of wind energy?

State whether an electric heater will consume more electrical energy or less electrical energy per second when the length of its heating element is reduced. Give reasons for your answers.

an object is performing damped oscillations . a force of magnitude F=F cos(wt) is applied on the object . Displacement amplitude is maximum when(1)w is slightly greater than natural frequency(2)w is slightly lesser than natural frequency (3)w is equal to natural frequency(4)all of these

Alex of mass 40 kg is standing at a cliff of height 15 m while his friend Sam of mass 50 kg is standing at another cliff of height 7 m. Who among them has greater potential energy?Take g = 10 ms−2.

The equivalent resistance between the points A &amp; B in the circuit is:

In the network shown in the figure, all resistors are identical with R = 300 Ω. The resistance Rab (in Ω) of the network is R=300 Ω100

The three types of chemical weapons used by the US during the Vietnam conflict are as listed below:

A beam of light is traveling from Region I to Region IV (refer figure). The refractive index of Region I, II, III and IV are n0,n02,n06andn08 respectively. The angle of incidence θ for which the beam just misses entering Region IV is:

Find the angle between the ray emergent ray and incident ray when the light goes from air to glass slab. Given μglass = 1.5

Why do different colors deviate at different angles when passing through a prism?

Which of the following is not one of the prime health risks associated with greater UV-radiation due to depletion of stratosphere ozone ?

A solid current carrying conductor of radius R is having current per unit area J=α r/R where α is a cons†an t and r is the dis†an ce from the axis. Find magnetic field at dis†an ce x from the axis of wire. Assume x>R

The diagram in Fig. 9.28 shows three lamps and three switches 1, 2 and 3 connected with two cells. (a) Name the switch/ switches to be closed so as to light all the three lamps. (b) How are then the lamps connected : in series or in parallel ? Fig ; 9.28

Calculate the PD that should be applied across a wire of 10Ω resistance so as to pass a current of 50mA through it. Calculate the value of charge that will flow through the wire in 1 minute.

ntA certain prism is found to produce a minimum deviation of 38^°. It produces a deviation of 44^° when the angle of incidence is either 42^° or 62^°. What is the angle of incidence when it is undergoing minimum deviationn nt1)45^°n nt2)49^°n nt3)40^°n nt4)55^°n

Find equivelent resistance between A and B.

a long wire is carrying a current of 2A into the plane of paper through origin of X-Y plane. find the magnetic field of induction at (3,4)m.

For an incident ray directed towards centre of curvature of a spherical mirror, the reflected ray : (a) retraces its path (b) passes through the focus (c) passes through the pole (d) becomes parallel to the principal axis.

How much energy is transferred when 10 A current flows through a resistor of resistance 5 Ω for time of 30 minutes?

39. What percent of air would be expelled from a flask kept at 27 degree celsius on heating it to 477 degree celsius?

The mass and the diameter of a planet are three times the respective values for the Earth. The period of oscillation of a simple pendulum on the Earth is 2 Sec. The Period of oscillation of the same pendulum on the planet would be:

7.The ratio of magnetic inductions at the center of a circular coil of radius a and on its axis at a distance equal to its radius will be

One half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.

Is it possible to change one element into another element

Bullet Of 0.03kg mass each Hit a plate At The Rate Of 200 bullets Per second,with velocity of 50m/s and Reflect Back with a Velocity of 30m/s.find the Average force acting On The Plate

An object is placed in front of a convex mirror at 60 m from the mirror. Its radius of curvature is 40 m. The object starts moving towards the mirror at 20 m s−1. Find the average speed of the image after a time interval of 2 seconds?

Question 14 Expand the abbreviation GAP. (a) Governmental Agency for Pollution Control (b) Gross Assimilation by Photosynthesis (c) Ganga Action Plan (d) Governmental Agency for Animal Protection

When a car is in uniform motion along a straight line, then___

A wire of fixed length is bent to form a coil of one turn. It is again bent to form a coil of three turns. If in both cases same amount of current is passed, then the ratio of the intensities of magnetic field produced at the centre of the coil of one turn and three turns respectively will be,

The maximum number of electrons in a shell can be calculated by the formula _______.

Q.28. An aluminium wire has radius 0.25 mm and length of 75 m. If the resistanceof the wire is 10 Ω , calculate the resistivity of aluminum.

Two short bar magnets A and B are identical and these are arranged as shown in the figure. A magnetic needle is placed between the magnets at point P which gets deflected through an angle θ under the influence of magnets. The ratio of distances d1 and d2 will be.

The equivalent resistance between the points A & B in the circuit is: