Question # 1

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

Choose an answer

49 rad/sec²

1 rad/sec²

0.16 rev/sec²

Both A and C

Both B and C

Photons must have energy equal to

Choose an answer

ev

En

hf

None of these

The machines which deals with the objects moving with velocities approaching that of light is called:

Choose an answer

Relativistic mechanics

Wave mechanics

Quantum

Statics mechanics

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Choose an answer

60 W bulb

100 W bulb

Both equally

None of these

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Choose an answer

adiabatically

isothermally

isochorically

isobarically

Neutron was discovered by

Choose an answer

Curie

Roentgen

Chadwick

Rutherford

Monochromatic light means waves of:

Choose an answer

Same frequency

Same colour

Same wavelength

All of them

With increase of temperature, the viscosity of liquid and gases

Choose an answer

Increases for both

Decreases for both

Increases for liquids and decreases for gases

Decreases for liquids and increases for gases

The force which opposes the applied force producing the displacement in the spring is called

Choose an answer

restoring force

periodic force

centripetal force

resistive force

The vast majority of solids are in the form of

Choose an answer

amorphous structure

polymeric structure

crystalline structure

all of them

A boat of mass 40 kg is at rest, A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. What is the velocity of boat?

Choose an answer

4 m/s

2 m/s

8 m/s

1 m/s

A square loop of wire is moving through a uniform magnetic field. The normal to the loop is oriented parallel to the magnetic field. The emf induced in the loop is:

Choose an answer

Zero

Of smaller magnitude

Of larger magnitude

Sometimes B, sometimes C

Neither of these

At the starting point of the free fall motion of an object, its acceleration will be

Choose an answer

maximum

minimum

zero

none of them

The curve representing an isothermal process is called

Choose an answer

adiabat

isotherm

fixed temperature

none of them

The fourth band is a:

Choose an answer

Silver band

Red band

Gold band

Either A or C

Either A or B

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Choose an answer

one

two

three

four

five

A change in position of a body from its initial position to its final position is known as

Choose an answer

relative motion

displacement

distance

acceleration

The special theory of relativity treats problems invoving

Choose an answer

inertial frame of references

accelerating frame of references

both of these

none of these

The SI unit of capacitance is

Choose an answer

Farad

Henry

Ohm

Volt

A car is turning around a corner at 10 m/sec as it travels along an arc of circle. If value of centripetal acceleration is 10 m/sec²in this case, find radius of the circular path:

Choose an answer

1 m

5 m

10 m

15 m

Computer chips are made from

Choose an answer

Conductors

Semiconductors

Insulators

Both A and B

A particle having the mass of electron and charge of a proton is called a

Choose an answer

photon

position

antiproton

antineutrino

If a mass of 10 gm is suspended from a spring of k = 9.8 Nm^-1, then the extension will be:

Choose an answer

1 cm

1 m

10 mm

None of these

If water in a closed bottle is taken up to the moon and opened, the water gets

Choose an answer

Freeze

Boiled

Dissociated into O₂and H₂

Evaporated

The effect of applying a force on a moving body is to change

Choose an answer

its direction of motion only

its speed of motion only

both the direction and speed of motion

its inertia only

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Choose an answer

The upper half of the image is cut off

The brightness of the image is reduced

The brightness of the image is increased

No effect at all

When a body moves to and fro motion, this type of motion is called

Choose an answer

translatory motion

circular motion

oscillatory motion

all of them

The image of the tip of a needle is never sharp because of

Choose an answer

Polarization of light

Interference of light

Diffraction of light

Reflection of light

If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is

Choose an answer

360 m/s

306 m/s

331 m/s

340 ms

A metal road of length 1m is moving at a speed of 1 ms^-1In a direction making angle of 30º with 0.5 Y magnetic field. The emf produced in the rod is:

Choose an answer

0.25 N

0.25 V

2.5 V

2.5 N

25 V

In a semi-conductor material, current flows due to

Choose an answer

positive charge

negative charge

both of them

none of them

More Classes

Other Links

Physics ECAT Pre Engineering 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