Voltage in the secondary coil of a transformer does not depend up

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

161.

 A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle θ. The frictional force

  • converts translational energy to rotational energy

  • dissipates energy as heat

  • decreases the rotational motion

  • decreases the rotational and translational motion


162.

A block B is pushed momentarily along a horizontal surface with an initial velocity v. If µ is the coefficient of sliding friction between B and the surface, block B will come to rest after a time

  • ν

  • ν

  • gν

  • νg


163.

Diwali rocket is ejecting 50 g of gases/s at a velocity of 400 m/s. The accelerating force on the rocket will be

  • 22 dyne

  • 20 N

  • 20 dyne

  • 100 N


164.

A weightless thread can bear tension upto 37 N. A stone of mass 500 g is tied to it and revolved in a circular path of radius 4 min a vertical plane. If g = 10 ms-2,  then the maximum angular velocity the stone will be

  • 2 rad s-1

  • 4 rad s-1

  • 8 rad s-1

  • 16 rad s-1


Advertisement
165.

A bullet of mass 20 g and moving with 600 m/s collides with a block of mass 4 kg hanging with the string. What is velocity of bullet when it comes out of block, if block rises to height 0.2 m after collision?

  • 200 m/s

  • 150 m/s

  • 400 m/s

  • 300 m/s


Advertisement

166.

Voltage in the secondary coil of a transformer does not depend upon

  • frequency of the source

  • voltage in the primary coil

  • ratio of number of turns in the two coils

  • Both (b) and (c)


A.

frequency of the source

NPNS = VPVS = n = Turns ratio

Ratio of number of  turns in the two coils results induced emf. 

Voltage in the primary coil also affects the induced emf.


Advertisement
167.

A shell of mass 20 kg at rest explodes into two fragments whose masses are in the ratio 2 : 3. The smaller fragment moves with a velocity of 6 m/s. The kinetic energy of the larger fragment is

  • 96 J

  • 216 J

  • 144 J

  • 360 J


168.

An electric bulb has a rated power of 50 W at 100 V. If it is used on an AC source 200 V, 50 Hz, a choke has to be used in series with it. This choke should have an inductance of

  • 0.1 mH

  • 1 mH

  • 0.1 mH

  • 1.1 H


Advertisement
169.

Three concurrent co-planar forces 1 N, 2 N and 3 N acting along different directions on a body

  • can keep the body in equilibrium if 2 N and 3 N act at right angle

  • can keep the body in equilibrium if 1 N and 2 N act at right angle

  • cannot keep the body in equilibrium

  • can keep the body in equilibrium in 1 N and 3 N act at an acute angle


170.

Two rectangular blocks A and B of masses 2 kg and 3 kg respectively are connected by a spring of constant 10.8 Nm-1 and are placed on a frictionless horizontal surface. The block A was given an initial velocity of 0.15 ms-1 in the direction shown in the figure. The maximum compression of the spring during the motion is

 

  • 0.01 m

  • 0.02 m

  • 0.05 m

  • 0.03 m


Advertisement