Quantitative Reasoning MCQS for NTS Set 2

The direction of induced current is such that it opposes the very cause that has produced it This is the law of

Faraday

Fleming

Lenz

Kirchoff

In a simple harmonic motion (SHM) which of the following does not hold?

The potential energy is maximum at the mean position

The force on the particle is maximum at the ends

The kinetic energy is maximum at the mean position.

The acceleration is minimum at the mean position

In an L-R circuit time constant is that time in which current grows from zero to the value

0.50 I

0.73 I

I

0.63 I_o

Angular momentum is

Scalar

Vector (polar)

Vector (axial)

None of these

To explain his theory Bohr used

Conservation of angular momentum

Conservation of energy

Conservation of linear momentum

Conservation of quantum frequency

A photocell with a constant p.d of V volt across it illuminated by a point source from a distance of 25 cm. When the source is moved to a distance of 1 m, the electrons emitted by the photocell

Carry 1/4th their previous energy

Are 1/4th as numerous as before

Carry 1/4th their previous momentum

Are 1/6th as numerous as before

To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined

Parallel

Antiparallel

At angle 60°

Perpendicular to each other

A train of 150 m length is going towards north direction at a speed of 10 ms^-1 A parrot flies at a speed of 5 ms^-1 towards south direction parallel to the railway track,The time taken by the parrot to cross the train is equal to

15 s

10 s

8 s

12 s

The part of a transistor which is heavily doped to produce large number of majority carriers is

Any of the above depending on nature of transistor.

Base

Emitter

Collector

The velocity of a particle at an instant is 10 m/s and after 5 s the velocity of the particle is 20 m/s.The velocity 3s before in m/s is:

6

8

7

4