Question # 1

A metastable stae:

Choose an answer

Is an excited state

Is that in which excited electron is stable

Is that in which excited electron is usually unstable

Means a time interval of 10^-8second

Both (A) and (C)

A transistor has:

Choose an answer

One region

Two regions

Three regions

Four regions

None is correct

The Phenomenon of generation of induced emf is called

Choose an answer

Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both A and B

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Choose an answer

Thumb

Curled fingers

Middle finger

Arm of right hand

None of these

Addition of 2.189 kg, 0.089 kg, 11.8 kg, and 5.32 kg gives the rounded off answer as:

Choose an answer

19.398

19.400

19.4

19.3

When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as

Choose an answer

impurification

adding

doping

extrinsivity

A galvanometer is an instrument used to

Choose an answer

measure voltage across a circuit

detect current in a circuit

measure current flowing through a circuit

none of these

The magnetic field inside a solenoid can be increased by:

Choose an answer

Increasing n

Decreasing I

Increasing I

By using iron core within solenoid

All correct except (B)

The work performed on an object does not depend on:

Choose an answer

Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

When platinum wire is heated, it appears cherry red at

Choose an answer

1600°C

900°C

1100°C

1300°C

When a position comes close to an electron they annihilate into

Choose an answer

one photon

two photons which travel in the same direction

two photons which travels in the opposite direction

two photons which travel in any direction

The molecules or ions in a crystalline solid are

Choose an answer

static

not static

randomly moving

all of them

A car engine is based on the principle of

Choose an answer

Bernoulli's equation

Verturi relation

Torricelli;s theorem

None of these

In the formula for velocity of efflux v = √2gh, h is the

Choose an answer

Height of liquid column from bottom of vessel

Height of orifice from the bottom of the vessel

Height of liquid column above the orifice

Height of the vessel

Multimode graded index fibre core has diameter of

Choose an answer

40-200 μm

50-1000 μm

50-150 μm

50-300 μm

In full wave rectification by bridge the number of diodes required are

Choose an answer

3

4

2

5

When the direction of r and F are reverse

Choose an answer

the direction of torque remain unaltered

the magnitude of torque remain unchanged

both the magnitude and direction of torque remain unchanged

both the magnitude and direction of torque change

The drag force increase if the speed of the object moving through a fluid

Choose an answer

Increases

Decreases

remains constant

None of these

The speed of sound in air is

Choose an answer

320 ms^-1

323 ms^-1

330 ms^-1

333 ms^-1

The velocity of flow of a liquid through an orifice at the bottom of a tank depends upon the

Choose an answer

Density of liquid

Cross sectional area of orifice

Height of liquid above the orifice

None of there

The unit of surface energy per unit area may be expressed as

Choose an answer

Nm^-2

Nm^-1

Nm

Nm²

The time of flight of a projectile motion equals to

Choose an answer

half of the time to reach maximum height

twice the time to reach maximum height

one fourth of time to reach maximum height

time to reach maximum height

More Classes

Other Links

Physics General Science Test Medium Mode MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer