50278 + Interview Questions in Physics Page 9 InterviewSolution

401.	A stone falls from a balloon that is descending at a uniform rate of 12 m/s. The displacement of the stone from the point of release after 10 sec is
Answer» A stone falls from a balloon that is descending at a uniform rate of $12 m/s$ . The displacement of the stone from the point of release after $10 sec$ is

Discussion

402.	The rotation period of an earth satellite close to the surface of the earth is 83 minutes. The time period of another earth satellite in an orbit at a distance of three earth radii from its surface will be
Answer» The rotation period of an earth satellite close to the surface of the earth is 83 minutes. The time period of another earth satellite in an orbit at a distance of three earth radii from its surface will be

Discussion

403.	H Alpha line of Balmer series 6500 angstroms the wavelength of h GaMa is?
Answer» H Alpha line of Balmer series 6500 angstroms the wavelength of h GaMa is?

Discussion

404.	A point P (on a wheel) is the contact point of the wheel and the ground. The wheel rolls on the ground without slipping. The value of displacement of the point P, when the wheel completes half a rotation is (if radius of wheel is 1 m)
Answer» A point $P$ (on a wheel) is the contact point of the wheel and the ground. The wheel rolls on the ground without slipping. The value of displacement of the point $P$ , when the wheel completes half a rotation is (if radius of wheel is $1 m$ )

Discussion

405.	The most probable speed of an ideal gas at constant pressure varies with density as
Answer» The most probable speed of an ideal gas at constant pressure varies with density as

Discussion

406.	41.A block of mass 1kg is moving along x axis .A force of 1N acts on the block.The force F always points towards the origin O.The magnitude of F is constant except at point O,where it is 0.At t=0 the block is released from rest at x=2m.What is the period of motion of the block?
Answer» 41.A block of mass 1kg is moving along x axis .A force of 1N acts on the block.The force F always points towards the origin O.The magnitude of F is constant except at point O,where it is 0.At t=0 the block is released from rest at x=2m.What is the period of motion of the block?

Discussion

407.	131. 1 Calculate the electric current passing through 3 ohm and 6 ohm resistor 2 pd across each resistor
Answer» 131. 1 Calculate the electric current passing through 3 ohm and 6 ohm resistor 2 pd across each resistor

Discussion

408.	If particle start from initial velocity v.such that retardation is equal to kv where k greater than 0 and v is velocity at any time the paticle come into rest at
Answer» If particle start from initial velocity v.such that retardation is equal to kv where k greater than 0 and v is velocity at any time the paticle come into rest at

Discussion

409.	Two charges 9 uC and 1 uC are placed at separation of 10 cm. At what distance from 1 uC should a third charge be placed such that if experience no net force due to these charges.(A) 2 cm (B) 2.50 cm(C) 3.33 cm (D) 5 cm
Answer» Two charges 9 uC and 1 uC are placed at separation of 10 cm. At what distance from 1 uC should a third charge be placed such that if experience no net force due to these charges. (A) 2 cm (B) 2.50 cm (C) 3.33 cm (D) 5 cm

Discussion

410.	Magnetic flux changes through a coil of resistance 10Ω. As a result, an induced current is developed in it, which varies with time as shown. The magnitude of change in magnetic flux through the coil is[0.77 Mark]
Answer» Magnetic flux changes through a coil of resistance $10 Ω .$ As a result, an induced current is developed in it, which varies with time as shown. The magnitude of change in magnetic flux through the coil is $[$ 0.77 Mark $]$

Discussion

411.	61.A galvanometer gives full scale deflection with 0.2 A in its coil. The resistance of its coil is 10 ohm. How much shunt resistance is required to convert it into an ammeter to read upto 1.8 A. 1) 0.5 ohm 2) 2.5 ohm 3) 1.25 ohm 4) 10 ohm
Answer» 61.A galvanometer gives full scale deflection with 0.2 A in its coil. The resistance of its coil is 10 ohm. How much shunt resistance is required to convert it into an ammeter to read upto 1.8 A. 1) 0.5 ohm 2) 2.5 ohm 3) 1.25 ohm 4) 10 ohm

Discussion

412.	A particle executing simple harmonic motion along y-axis has its motion described by the equation . The amplitude of the simple harmonic motion is a)A b)B c)A+B d)\sqrt{A^2+B^2
Answer» A particle executing simple harmonic motion along y-axis has its motion described by the equation . The amplitude of the simple harmonic motion is a)A b)B c)A+B d)\sqrt{A^2+B^2

Discussion

413.	If the speed of a car is given as v=3t2+2t m/s, the average speed in 10 sec is
Answer» If the speed of a car is given as $v = 3 t^{2} + 2 t m/s$ , the average speed in $10 s e c$ is

Discussion

414.	An electron of mass m is accelerated through a potential difference of V and then it enters a magnetic field of induction B normal to the lines. Then, the radius of the circular path is
Answer» An electron of mass $m$ is accelerated through a potential difference of $V$ and then it enters a magnetic field of induction $B$ normal to the lines. Then, the radius of the circular path is

Discussion

415.	In the figure shown, for an angle of incidence 45∘, at the top surface, what is the minimum refractive index needed for total internal reflection at vertical face AD ?
Answer» In the figure shown, for an angle of incidence $45^{\circ}$ , at the top surface, what is the minimum refractive index needed for total internal reflection at vertical face $A D$ ?

Discussion

416.	The beta particles of a radioactive metal originate from.
Answer» The beta particles of a radioactive metal originate from.

Discussion

417.	131. A point charge is placed at distance a/2 perpendicular to the plane and above the centre of a square ofa side a .the electric flux through the square is
Answer» 131. A point charge is placed at distance a/2 perpendicular to the plane and above the centre of a square ofa side a .the electric flux through the square is

Discussion

418.	two similar springs PandQ have spring cons†an ts Kp and Kq such that kp>kq they stretched first by the sameamount case a then by the same force case b the workdone by the springs Wp andWq are related in case a and case
Answer» two similar springs PandQ have spring cons†an ts Kp and Kq such that kp>kq they stretched first by the sameamount case a then by the same force case b the workdone by the springs Wp andWq are related in case a and case

Discussion

419.	You have learnt that a travelling wave in one dimension is represented by a function y = f (x, t) where x and t must appear in the combination x – υ t or x + v t, i.e. y = f (x ± υ t). Is the converse true? Examine if the following functions for y can possibly represent a travelling wave :(a) (x – υ t )² (b) log [(x + υ t)/x0] (c) 1/(x + υt)
Answer» You have learnt that a travelling wave in one dimension is represented by a function y = f (x, t) where x and t must appear in the combination x – υ t or x + v t, i.e. y = f (x ± υ t). Is the converse true? Examine if the following functions for y can possibly represent a travelling wave : (a) (x – υ t )² (b) log [(x + υ t)/x0] (c) 1/(x + υt)

419.

You have learnt that a travelling wave in one dimension is represented by a function y = f (x, t) where x and t must appear in the combination x – υ t or x + v t, i.e. y = f (x ± υ t). Is the converse true? Examine if the following functions for y can possibly represent a travelling wave :(a) (x – υ t )² (b) log [(x + υ t)/x0] (c) 1/(x + υt)

Answer»

You have learnt that a travelling wave in one dimension is represented by a function y = f (x, t) where x and t must appear in the combination x – υ t or x + v t, i.e. y = f (x ± υ t). Is the converse true? Examine if the following functions for y can possibly represent a travelling wave :

(a) (x – υ t )²

(b) log [(x + υ t)/x0]

(c) 1/(x + υt)

Discussion

420.	heater coil A takes t1sec to boil a certain quantity of water. heater coil B takes t2 sec to boil the same quantity of water. if Aand B are connected ìn paralle the time taken to boil the same quantity of water by the combination is
Answer» heater coil A takes t1sec to boil a certain quantity of water. heater coil B takes t2 sec to boil the same quantity of water. if Aand B are connected ìn paralle the time taken to boil the same quantity of water by the combination is

Discussion

421.	The velocity - time graph of a body with a constant acceleration is:
Answer» The velocity - time graph of a body with a constant acceleration is:

Discussion

422.	the speed of a particle at its maximum height is half of the initial speed. if maximum height of the projectile is k timrs of the horizontal range the value of k i
Answer» the speed of a particle at its maximum height is half of the initial speed. if maximum height of the projectile is k timrs of the horizontal range the value of k i

Discussion

423.	write de-broglie wave equation and explain the terms in i
Answer» write de-broglie wave equation and explain the terms in i

Discussion

424.	ntA block slides down an inclined plane of slope of angle theta with a constant velocity v. it is then projected up the plane with an initial velocity u, The distance upto which it will rise before coming to rest isn
Answer» ntA block slides down an inclined plane of slope of angle theta with a constant velocity v. it is then projected up the plane with an initial velocity u, The distance upto which it will rise before coming to rest isn

Discussion

425.	Two block of masses 10 kg and 20 kg are connected by a light string as shown in the figure. If two forces of 50 N and 20 N are exerted on the system, the net acceleration of 10 kg mass will be
Answer» Two block of masses 10 kg and 20 kg are connected by a light string as shown in the figure. If two forces of 50 N and 20 N are exerted on the system, the net acceleration of 10 kg mass will be

Discussion

426.	∫2x−√sin−1x√1−x2dx is equal to(where C is constant of integration)
Answer» $\int \frac{2 x - \sqrt{{sin}^{- 1} x}}{\sqrt{1 - x^{2}}} d x$ is equal to (where $C$ is constant of integration)

Discussion

427.	A thin prism is made of a material having refractive indices 1.61 and 1.65 for red and violet light. The dispersive power of the material is 0.07. It is found that a beam of yellow light passing through the prism suffers a minimum deviation of 4.0∘ in favourable conditions. Calculate the angle of the prism.
Answer» A thin prism is made of a material having refractive indices 1.61 and 1.65 for red and violet light. The dispersive power of the material is 0.07. It is found that a beam of yellow light passing through the prism suffers a minimum deviation of ${4.0}^{\circ}$ in favourable conditions. Calculate the angle of the prism.

Discussion

428.	89. If there is a cavity is present inside a uniformly charged sphere,why field inside cavity is uniform though there is no charge inside it & similarl in case of gravitational field though there no mass is present?
Answer» 89. If there is a cavity is present inside a uniformly charged sphere,why field inside cavity is uniform though there is no charge inside it & similarl in case of gravitational field though there no mass is present?

Discussion

429.	There are 3 plates a,b and c such that the dis†an ce between plate a and plate b is d and dis†an ce between plate b and plate c is 2d. If a charge of Q is given to plate b then charge appearing on right side of plate c is
Answer» There are 3 plates a,b and c such that the dis†an ce between plate a and plate b is d and dis†an ce between plate b and plate c is 2d. If a charge of Q is given to plate b then charge appearing on right side of plate c is

Discussion

430.	Two soap bubbles in vacuum having radii 3 cm and 4 cm respectively coalesce under isothermal conditions to form a single bubble. Then the radius of the new bubble in cm is
Answer» Two soap bubbles in vacuum having radii $3 cm$ and $4 cm$ respectively coalesce under isothermal conditions to form a single bubble. Then the radius of the new bubble in $c m$ is

Discussion

431.	A wheel of 50 cm radius rotates through 360∘ around its axis. What is the distance travelled by a point on the edge of the wheel?
Answer» A wheel of $50 cm$ radius rotates through $360^{\circ}$ around its axis. What is the distance travelled by a point on the edge of the wheel?

Discussion

432.	22.The dip at a place is delta.For measuring it the axis of the dip needle is perpendicular tothe magnetic meridian.If the axis of the dip needle makes an angle theta with the magnetic meridian,the apparent dip will be given by a)tan delta cosec theta b)tan delta sin theta c)tan delta cos theta d)tan delta sec theta
Answer» 22.The dip at a place is delta.For measuring it the axis of the dip needle is perpendicular tothe magnetic meridian.If the axis of the dip needle makes an angle theta with the magnetic meridian,the apparent dip will be given by a)tan delta cosec theta b)tan delta sin theta c)tan delta cos theta d)tan delta sec theta

Discussion

433.	The acceleration-displacement graph of a partice moving in a straight line is shown in the figure. Initial velocity of the particle is zero. Find the velocity of the particle when displacement of the particle is 12 m.
Answer» The acceleration-displacement graph of a partice moving in a straight line is shown in the figure. Initial velocity of the particle is zero. Find the velocity of the particle when displacement of the particle is $12 m$ .

Discussion

434.	112.What is dimension of tension?
Answer» 112.What is dimension of tension?

Discussion

435.	which of the following option is correct?(1)The total number of charged particles in the universe remains conserved(2) The magnitude of total positive charge of the universe is cons†an t(3) The magnitude of total negative charge of the universe is cons†an t4) The total charge of the universe is constant universe
Answer» which of the following option is correct?(1)The total number of charged particles in the universe remains conserved(2) The magnitude of total positive charge of the universe is cons†an t(3) The magnitude of total negative charge of the universe is cons†an t4) The total charge of the universe is constant universe

Discussion

436.	The unit of length , velocity and force are doubled. Which of the followings are correct change in other units?(1) Unit of time is doubled(2)Unit of mass is doubled(3)Unit of momentum is doubled(4)Unit of energy is doubled
Answer» The unit of length , velocity and force are doubled. Which of the followings are correct change in other units? (1) Unit of time is doubled (2)Unit of mass is doubled (3)Unit of momentum is doubled (4)Unit of energy is doubled

Discussion

437.	The value of two resistance are R1(6+/- 0.3) k ohm R2(10+/-0.2) k ohm. Find the % error in the equivalent resistance when they are connected in parallel.
Answer» The value of two resistance are R1(6+/- 0.3) k ohm R2(10+/-0.2) k ohm. Find the % error in the equivalent resistance when they are connected in parallel.

Discussion

438.	Obtain the resonant frequency wr of a series LCR circuit with L = 2.0H, C = 32 μF and R = 10 W. What is the Q-value of this circuit?
Answer» Obtain the resonant frequency wr of a series LCR circuit with L = 2.0H, C = 32 μF and R = 10 W. What is the Q-value of this circuit?

Discussion

439.	A short bar magnet placed with its axis at 30 degrees with uniform magnetic field of 0.16T experience a torque of magnitude of 0.032N-m. The potential energy of bar magnet in the stable equilibrium and in unstable equillibrium respectively:- (1) -0.064J,+0.064 (2)-0.032J,+0.032J (3)-0.016J,+0.016 (4)zero,zero
Answer» A short bar magnet placed with its axis at 30 degrees with uniform magnetic field of 0.16T experience a torque of magnitude of 0.032N-m. The potential energy of bar magnet in the stable equilibrium and in unstable equillibrium respectively:- (1) -0.064J,+0.064 (2)-0.032J,+0.032J (3)-0.016J,+0.016 (4)zero,zero

Discussion

440.	Suppose you place a sphere of mass 'm' and radius 'r'inside a smooth, heavy hemispherical bowl of radius of 37r placed on a horizontal table. If the sphere is given a small displacement, what is its period of oscillation?
Answer» Suppose you place a sphere of mass 'm' and radius 'r'inside a smooth, heavy hemispherical bowl of radius of 37r placed on a horizontal table. If the sphere is given a small displacement, what is its period of oscillation?

Discussion

441.	∫1√sec2x+tan2xdx=log\|f(x)+√g(x)\|+C, then which of the following is/are correct?
Answer» $\int \frac{1}{\sqrt{{sec}^{2} x + {tan}^{2} x}} d x = log \| f (x) + \sqrt{g (x)} \| + C$ , then which of the following is/are correct?

Discussion

442.	57.The acceleration of a particle which moves along the positive x axis varies with its position as shown. If the velocity of the particle is 0.8m/s at x=0 , the velocity at x = 1.4 m (in m/s), is 1) 1.6 2) 1.2 3) 1.4 4) 2.4
Answer» 57.The acceleration of a particle which moves along the positive x axis varies with its position as shown. If the velocity of the particle is 0.8m/s at x=0 , the velocity at x = 1.4 m (in m/s), is 1) 1.6 2) 1.2 3) 1.4 4) 2.4

Discussion

443.	When an object is shot from the botom of a long smooth inclined plane kept at an angle of 60 degree with horizontal, it can travel a distance of X1 along the plane. But when inclination is decreased to 30 degree and the same object is shot with same velocity, it can travel a distance of X2. Then X1:X2?
Answer» When an object is shot from the botom of a long smooth inclined plane kept at an angle of 60 degree with horizontal, it can travel a distance of X1 along the plane. But when inclination is decreased to 30 degree and the same object is shot with same velocity, it can travel a distance of X2. Then X1:X2?

Discussion

444.	The smallest division on the main scale of a vernier callipers is 1 mm and 10 vernier divisions coincide with 9 main scale divisions. While measuring the diameter of a sphere, the zero mark of the vernier scale lies lies between 20 and 21 mm and the fifth division of the vernier scale coincide with a main scale division. Then diameter of the sphere is
Answer» The smallest division on the main scale of a vernier callipers is 1 mm and 10 vernier divisions coincide with 9 main scale divisions. While measuring the diameter of a sphere, the zero mark of the vernier scale lies lies between 20 and 21 mm and the fifth division of the vernier scale coincide with a main scale division. Then diameter of the sphere is

Discussion

445.	What is shape of graph of resistivity of manganin vs temperature
Answer» What is shape of graph of resistivity of manganin vs temperature

Discussion

446.	A composite metal bar of uniform section is made up of length 25 cm of copper, 10 cm of nickel and 15 cm of aluminium. Each part being in perfect thermal contact with the adjoining part. The copper end of the composite rod is maintained at 100∘ C and the aluminium end at 0∘ C . The whole rod is covered with belt so that there is no heat loss occurs at the sides. If KCa = 2KAl , and KAl = 3KNi , then what will be the temperatures of Cu - Ni and Ni- Al junctions respectively
Answer» A composite metal bar of uniform section is made up of length 25 cm of copper, 10 cm of nickel and 15 cm of aluminium. Each part being in perfect thermal contact with the adjoining part. The copper end of the composite rod is maintained at $100^{\circ} C$ and the aluminium end at $0^{\circ} C$ . The whole rod is covered with belt so that there is no heat loss occurs at the sides. If $K_{C a} = 2 K_{A l}$ , and $K_{A l} = 3 K_{N i}$ , then what will be the temperatures of Cu - Ni and Ni- Al junctions respectively

446.

A composite metal bar of uniform section is made up of length 25 cm of copper, 10 cm of nickel and 15 cm of aluminium. Each part being in perfect thermal contact with the adjoining part. The copper end of the composite rod is maintained at 100∘ C and the aluminium end at 0∘ C . The whole rod is covered with belt so that there is no heat loss occurs at the sides. If KCa = 2KAl , and KAl = 3KNi , then what will be the temperatures of Cu - Ni and Ni- Al junctions respectively

Answer»

A composite metal bar of uniform section is made up of length 25 cm of copper, 10 cm of nickel and 15 cm of aluminium. Each part being in perfect thermal contact with the adjoining part. The copper end of the composite rod is maintained at $100^{\circ} C$ and the aluminium end at $0^{\circ} C$ . The whole rod is covered with belt so that there is no heat loss occurs at the sides. If $K_{C a} = 2 K_{A l}$ , and $K_{A l} = 3 K_{N i}$ , then what will be the temperatures of Cu - Ni and Ni- Al junctions respectively

Discussion

447.	A string is hanging from a rigid support. A transverse wave pulse is setup at the free end. The velocity v of the pulse related to the distance x covered by it is
Answer» A string is hanging from a rigid support. A transverse wave pulse is setup at the free end. The velocity $v$ of the pulse related to the distance $x$ covered by it is

Discussion

448.	The temperature co-efficient of resistance of a wire is 0.00125/∘C. At 300 K , it’s resistance is 1Ω. The resistance of the wire will be 2Ω at
Answer» The temperature co-efficient of resistance of a wire is $0.00125 /^{\circ} C$ . At 300 K , it’s resistance is $1 Ω$ . The resistance of the wire will be $2 Ω$ at

Discussion

449.	A body thrown vertically upward reaches its maximum height in time T. The body is at a height h (which is less than maximum height) at two instants of time t1 and t2 . Hence product t1.t2 is given by
Answer» A body thrown vertically upward reaches its maximum height in time T. The body is at a height h (which is less than maximum height) at two instants of time t1 and t2 . Hence product t1.t2 is given by

Discussion

450.	If the resistance of circuit having 12v source is increased by 4ohm, the current drops by 0.5A. What is the original resistance of the circuit?
Answer» If the resistance of circuit having 12v source is increased by 4ohm, the current drops by 0.5A. What is the original resistance of the circuit?

Discussion

Explore topic-wise InterviewSolutions in .

A stone falls from a balloon that is descending at a uniform rate of 12 m/s. The displacement of the stone from the point of release after 10 sec is

The rotation period of an earth satellite close to the surface of the earth is 83 minutes. The time period of another earth satellite in an orbit at a distance of three earth radii from its surface will be

H Alpha line of Balmer series 6500 angstroms the wavelength of h GaMa is?

A point P (on a wheel) is the contact point of the wheel and the ground. The wheel rolls on the ground without slipping. The value of displacement of the point P, when the wheel completes half a rotation is (if radius of wheel is 1 m)

The most probable speed of an ideal gas at constant pressure varies with density as

41.A block of mass 1kg is moving along x axis .A force of 1N acts on the block.The force F always points towards the origin O.The magnitude of F is constant except at point O,where it is 0.At t=0 the block is released from rest at x=2m.What is the period of motion of the block?

131. 1 Calculate the electric current passing through 3 ohm and 6 ohm resistor 2 pd across each resistor

If particle start from initial velocity v.such that retardation is equal to kv where k greater than 0 and v is velocity at any time the paticle come into rest at

Two charges 9 uC and 1 uC are placed at separation of 10 cm. At what distance from 1 uC should a third charge be placed such that if experience no net force due to these charges.(A) 2 cm (B) 2.50 cm(C) 3.33 cm (D) 5 cm

Magnetic flux changes through a coil of resistance 10Ω. As a result, an induced current is developed in it, which varies with time as shown. The magnitude of change in magnetic flux through the coil is[0.77 Mark]

61.A galvanometer gives full scale deflection with 0.2 A in its coil. The resistance of its coil is 10 ohm. How much shunt resistance is required to convert it into an ammeter to read upto 1.8 A. 1) 0.5 ohm 2) 2.5 ohm 3) 1.25 ohm 4) 10 ohm

A particle executing simple harmonic motion along y-axis has its motion described by the equation . The amplitude of the simple harmonic motion is a)A b)B c)A+B d)\sqrt{A^2+B^2

If the speed of a car is given as v=3t2+2t m/s, the average speed in 10 sec is

An electron of mass m is accelerated through a potential difference of V and then it enters a magnetic field of induction B normal to the lines. Then, the radius of the circular path is

In the figure shown, for an angle of incidence 45∘, at the top surface, what is the minimum refractive index needed for total internal reflection at vertical face AD ?

The beta particles of a radioactive metal originate from.

131. A point charge is placed at distance a/2 perpendicular to the plane and above the centre of a square ofa side a .the electric flux through the square is

two similar springs PandQ have spring cons†an ts Kp and Kq such that kp>kq they stretched first by the sameamount case a then by the same force case b the workdone by the springs Wp andWq are related in case a and case

heater coil A takes t1sec to boil a certain quantity of water. heater coil B takes t2 sec to boil the same quantity of water. if Aand B are connected ìn paralle the time taken to boil the same quantity of water by the combination is

The velocity - time graph of a body with a constant acceleration is:

the speed of a particle at its maximum height is half of the initial speed. if maximum height of the projectile is k timrs of the horizontal range the value of k i

write de-broglie wave equation and explain the terms in i

ntA block slides down an inclined plane of slope of angle theta with a constant velocity v. it is then projected up the plane with an initial velocity u, The distance upto which it will rise before coming to rest isn

Two block of masses 10 kg and 20 kg are connected by a light string as shown in the figure. If two forces of 50 N and 20 N are exerted on the system, the net acceleration of 10 kg mass will be

∫2x−√sin−1x√1−x2dx is equal to(where C is constant of integration)

89. If there is a cavity is present inside a uniformly charged sphere,why field inside cavity is uniform though there is no charge inside it & similarl in case of gravitational field though there no mass is present?

There are 3 plates a,b and c such that the dis†an ce between plate a and plate b is d and dis†an ce between plate b and plate c is 2d. If a charge of Q is given to plate b then charge appearing on right side of plate c is

Two soap bubbles in vacuum having radii 3 cm and 4 cm respectively coalesce under isothermal conditions to form a single bubble. Then the radius of the new bubble in cm is

A wheel of 50 cm radius rotates through 360∘ around its axis. What is the distance travelled by a point on the edge of the wheel?

The acceleration-displacement graph of a partice moving in a straight line is shown in the figure. Initial velocity of the particle is zero. Find the velocity of the particle when displacement of the particle is 12 m.

112.What is dimension of tension?

The unit of length , velocity and force are doubled. Which of the followings are correct change in other units?(1) Unit of time is doubled(2)Unit of mass is doubled(3)Unit of momentum is doubled(4)Unit of energy is doubled

The value of two resistance are R1(6+/- 0.3) k ohm R2(10+/-0.2) k ohm. Find the % error in the equivalent resistance when they are connected in parallel.

Obtain the resonant frequency wr of a series LCR circuit with L = 2.0H, C = 32 μF and R = 10 W. What is the Q-value of this circuit?

Suppose you place a sphere of mass 'm' and radius 'r'inside a smooth, heavy hemispherical bowl of radius of 37r placed on a horizontal table. If the sphere is given a small displacement, what is its period of oscillation?

∫1√sec2x+tan2xdx=log|f(x)+√g(x)|+C, then which of the following is/are correct?

57.The acceleration of a particle which moves along the positive x axis varies with its position as shown. If the velocity of the particle is 0.8m/s at x=0 , the velocity at x = 1.4 m (in m/s), is 1) 1.6 2) 1.2 3) 1.4 4) 2.4

What is shape of graph of resistivity of manganin vs temperature

A string is hanging from a rigid support. A transverse wave pulse is setup at the free end. The velocity v of the pulse related to the distance x covered by it is

The temperature co-efficient of resistance of a wire is 0.00125/∘C. At 300 K , it’s resistance is 1Ω. The resistance of the wire will be 2Ω at

A body thrown vertically upward reaches its maximum height in time T. The body is at a height h (which is less than maximum height) at two instants of time t1 and t2 . Hence product t1.t2 is given by

If the resistance of circuit having 12v source is increased by 4ohm, the current drops by 0.5A. What is the original resistance of the circuit?