Question # 1

Dimension of mass is written as:

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M

[M]

(M)

[m]

In and A.C. circuit, the current lags behind the emf. The power factor is 50% In order to make it 100%, What additional component is to be used?

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Impedance

Inductance

Capacitance

Resistance

The value of escape velocity of Earth planet comes out to be:

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11 m/sec

11 km/sec

11 km/hour

11 cm/sec

One complete round trip of the body about its mean position is called

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displacement

vibration

a complete motion

an acceleration

The work is stored in the inductor as

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Electric potential energy

Elastic potential energy

Magnetic energy

Absolute potential energy

Which one of the following has larger value of relative permitivity E_rat room temperature?

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Vaccum

Air

Glass

Water

The electric intensity outside the two oppositely charged parallel metal plates is

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Maximum

Minimum

Zero

Infinite

If force and displacement are in opposite direction, the work done is taken as:

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Positive work

Negative work

Zero work

Infinite work

An emf is set up in a conductor when it

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Is kept in a magnetic field

Is kept in an electric field

Moves across a magnetic field

Both A and B

None of these

Amplitude in SHM is equivalent to ______ in circular motion

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Diameter

Radius

Circumference

None of these

The second law gives the relationship between

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mass and velocity

force and acceleration

velocity and acceleration

mass and weight

The unit of product RC is

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volt

Resistance

Second

Coulomb

Coin of radius R is beaten uniform to make a disc of radius 2R.Its moment of inertia.

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Decreases

Increases

Remains the same

Decreases or increases depending on the actual value

The escape velocity of a body depends upon

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The mass of the body

The mass of the planet

Volume of body

Density of body

When a body moves in a circular path,no work is done by the force since.

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Force and displacement are perpendicular to each other

The force is always aways from the centre

There is no displacement

There is no net force

An electric field lines provides the information about

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Electric force

Direction

Medium

All of them

The escape velocity for the surface of moon is

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9.8 km/sec

11 km/sec

2.4 km/sec

2.9 km/sec

The metals become electrically conducting due to their

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Ductility

Hardness

Structure

All of them

In thrill machine rides at amusement parks, there can be an acceleration of

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2 g

3 g

More than 3 g

4 g

For geosynchronous satellite the orbital time period is

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Greater than earth s spinning time period

Less than earth s spinning time period

Equal to the earth s spinning time period

None of the earth

Monochromatic light directly means waves of

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Same frequency

Same color

Same wavelength

All of them

The work done in moving a positive charge of two coulombs from one point to another point when the potential difference between them is 5 volt.

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5 Joules

10 Joules

15 Joules

20 Joules

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