Question # 1

When platinum wire is heated, it appears cherry red at

Choose an answer

1600°C

900°C

1100°C

1300°C

A rotating wheel accelerates up to the value of 0.75 rev/sec²after 2 seconds of its start. Its angular velocity becomes:

Choose an answer

9.42 rad/sec

2.6 rev/sec

1.5 rev/sec

Both A and C

If a liquid is heated in weightlessness, the heat is transmitted through

Choose an answer

Conduction

Convection

Radiation

Neither, because the liquid cannot be heated in weightlessness

Cosine of an angle is positive in:

Choose an answer

2nd quadrant

3rd quadrant

4th quadrant

All of these

Good absorbers of heat are

Choose an answer

Poor emitters

Non emitters

Good emitters

Highly polarized

Which one is conservative force

Choose an answer

Electric force

Frictional force

Normal force

Air resistance

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

Choose an answer

100 ev

10⁶e v

10³e v

1.0 e v

The SI unit of conductivity is

Choose an answer

ohm-m

ohm^-1m^-1

ohm-m^-1

ohm^-1m

An emf is set up in a conductor when it

Choose an answer

Is kept in a magnetic field

Is kept in an electric field

Moves across a magnetic field

Both A and B

None of these

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

Triple point of water is

Choose an answer

273.16°F

372.16K

273.16°F

273.16

To get high resolving power for a telescope one should use

Choose an answer

Objective of large aperture

Objective of large focal length

Eye piece of large focal length

Eye piece of small focal length

A fly wheel of moment of inertia 500 kgm²is rotating at angular speed of 6 rad/s. What torque is needed to stop wheel in 3s

Choose an answer

500 Nm

1000 Nm

1500 Nm

2000 Nm

Everything in the vastness of space is in a state of

Choose an answer

Rest

Motion

Perpetual motion

None of these

When the velocity of a liquid flowing steadily in a tube increases,its pressure?

Choose an answer

Decreases

Increases

Remains same

Zero

Which of the following correctly states the base units of weight?

Choose an answer

N

N m s^-2

Kg m s^-1

Kg m s^-2

In the expression F x t the fore F is

Choose an answer

total force

instantaneous force

average force

all of them

The changes which involve friction or dissipation of energy are reversible through

Choose an answer

Conduction

Convection

Radiation

All of these

The capacity of a parallel plat capacitor depends on the

Choose an answer

Type of metal used

Thickness of plates

Potential applied across the plates

Separation between the plates

An object is placed between the focus and the optical center of the convex lens. The image formed is

Choose an answer

Real, erect and magnified

Virtual, inverted and magnified

Virtual, erect and diminished

Virtual, erect and magnified

Pull of the earth on a mass of 20 kg on the surface of earth is

Choose an answer

19.6 N

1960 N

196 N

None of these

Viscus force depends upon

Choose an answer

Coefficient of viscosity

Velocity of objects

Radius of object

All of these

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