Question # 1

Direction of motion ______ in circular motion:

Choose an answer

Changes off and on

Changes continuously

Does not change

None of them

If the velocity of the body decreases non-uniformly then the slope of the velocity-time graph will have

Choose an answer

different values

same values

zero valves

constant valves

The focal length of convex lens having magnifying power of 5.55 is:

Choose an answer

5.5 cm

5 cm

4.5 cm

6 cm

If the waves produced in a microwave oven are of wave-length 12 cm, then their frequency will be:

Choose an answer

2500 MHz

0.25 MHz

2500 KHz

None of these

In case of metallic conductors, the charge carriers are

Choose an answer

Protons

Electrons

Antiprotons

Positrons

Both A and B

A ball is dropped vertically down and it takes time t to reach the ground. At time t/2

Choose an answer

The ball had covered exactly half the distance

The velocity of the ball was V/3 where V is the velocity when it reached the ground

The ball had covered less than half the distance

The ball had covered more than half the distance

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

Choose an answer

a rocket

an aeroplane

a projectile

a ballon

Electric field lines emerge from the charge in:

Choose an answer

One dimension

Two dimensions

Three dimensions

Four dimensions

None of them

Examples of polymeric substances are:

Choose an answer

Plastic

Synthetic rubbers

Zirconia

All of these

Both (A) and (B)

In an adiabatic expansion, the temperature of the gas

Choose an answer

increases

becomes zero

decreases

decreases rapidly

The total energy of spring mass system is

Choose an answer

zero

changing with time

constant

none of them

Inverter is the name given to:

Choose an answer

NOT gate

OR gate

NOR gate

AND gate

XOR gate

Speed of light in vacuum depends upon:

Choose an answer

Frequency

Wavelength

Amplitude

None of these

An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:

Choose an answer

100 m/sec

140 m/sec

1960 m/sec

196 m/sec

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Choose an answer

1/2

More than 1/2

Less than 1/2

Between 1 and 2

The relation between charge 'Q' and current 'I' is given by

Choose an answer

Q = I/t

Q = It

Q = I²t

Q = I²/t

A circuit has a resistance of 11Ωan inductive reactance of 25Ωand a capacitance reactance of 18Ω. It is connected to an a.c. source of 200 V and 50 Hz. The current through the circuit (in amperes) is

Choose an answer

11

15

18

20

Current provided by a battery is maximum when

Choose an answer

Internal resistance equal to external resistance

Internal resistance is greater than external resistance

Internal resistance is less then external resistance

None of these

The percentage of available heat energy converted into work by a diesel engine is roughly

Choose an answer

35 %`

40 %

35 - 40 %

25 %

Smaller the damping, the resonance will be

Choose an answer

more flat

more sharp

both of them

none of them

Electric generators which convert mechanical energy into

Choose an answer

solar energy

thermal energy

kinetic energy

electrical energy

The error may occur due to:

Choose an answer

Negligence

Faulty apparatus

Inappropriate method

all of these

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

Choose an answer

Voltmeter

Avometer

Ammeter

None of these

Each atom in metal crystal:

Choose an answer

Remains fixed

Vibrates about a fixed point

Moves randomly

Rotates about center of a crystal

None of these

The change of magnetic flux through a circuit will produce

Choose an answer

Magnetic Field

Electric Field

emf

a.c

Amount of heat required to raise the temperature of a body through 1 K is called its

Choose an answer

Specific heat

Water equivalent

Thermal capacity

Entropy

The electrical forces between the molecules of a liquid are

Choose an answer

Repulsive

Attractive

Both A and B

None

Under normal circumstances, the volume of blood is sufficient to keep the vessels

Choose an answer

flatted for all times

inflated for all times

inflated for small times

none of them

When force and displacement are perpendicular to each other than work is equal to

Choose an answer

Unity

Infinity

Zero

-Fd

The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as

Choose an answer

m (1 - a/g)

m (1 + a/g)

m

Zero

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

Choose an answer

Parallel

Antiparallel

At angle 60°

Perpendicular to each other

More Classes

Other Links

ECAT Pre General Science Physics Online Test 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

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