NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 793 - 796 of 2142

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Question number: 793

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

MCQ▾

Question

The angular disc of copper, with inner radius a and outer radius b is rotating with a uniform angular speed ω, in a region where a uniform magnetic field B along the axis of rotation exists. Then, the emf induced between inner side and the outer rim of the disc is-

Angular disc of copper in magnetic field

Angular Disc of Copper in Magnetic Field

The angular disc of copper, with inner radius a and outer radius b is placed in a uniform magnetic field B.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Zero

d.

Equation

Question number: 794

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

Question

In an inductor of inductance L = 100 mH, a current of I = 10A is flowing. The energy stored in the inductor is

Choices

Choice (4) Response

a.

100 J

b.

10 J

c.

1000 J

d.

5 J

Question number: 795

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

Voltage (r. m. s) in the secondary coil of a transformer depends upon

(1) Voltage in the primary coil

(2) Ratio of number of turns in the two coils

(3) Frequency of the source

(4) Time-period of the source

Select the correct answers and mark it according to the following

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

2 and 4 are correct

c.

1 and 3 are correct

d.

1, 2 and 3 are correct

Question number: 796

» Experimental Skills » Screw Gauge

MCQ▾

Question

A ladder is leaned against a smooth wall and it is allowed to slip on a frictionless floor. Which figure represents trace of motion of its center of mass?

Choices

Choice (4) Response

a.

In showing trace of motion of its center of mass – Choice A

In Showing Trace of Motion of Its Center of Mass – Choice A

In above figure we show the graph in which a ladder is leaned against a smooth wall and it is allowed to slip on a frictionless floor with time, with different direction force.

b.

Graph showing trace of motion of its center of mass – Choice B

Graph Showing Trace of Motion of Its Center of Mass – Choice B

In above figure we show the graph in which a ladder is leaned against a smooth wall and it is allowed to slip on a frictionless floor with time, with different direction force.

c.

Graph showing trace of motion of its center of mass – Choice C

Graph Showing Trace of Motion of Its Center of Mass – Choice C

In above figure we show the graph in which a ladder is leaned against a smooth wall and it is allowed to slip on a frictionless floor with time, with different direction force.

d.

Graph showing trace of motion of its center of mass – Choice D

Graph Showing Trace of Motion of Its Center of Mass – Choice D

In above figure we show the graph in which a ladder is leaned against a smooth wall and it is allowed to slip on a frictionless floor with time, with different direction force.

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