Question # 1

Liquids and gasses have

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zero viscosity

non-zero viscosity

very large viscosity

very small viscosity

Peak value of alternative current is:

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one of its Instantaneous value

Equal to its RMS value

The same as its peak-to-peak value

Both (B) and (C)

None of these

Physical quantities are often divided into ______ categories

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3

2

9

5

Work is a Quantity

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Vector

Scalar

Non-physical

None of these

Current varies with voltage

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Inversely

as square root

Directly

None of these

If the distance between two charges is doubled, the force between them will become

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Double

Half

Three times

One fourth

One third

During each cycle, alternating voltage reaches a peak value

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One time

Two times

Four times

A number of times depending on the frequency

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:

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Zero

Of smaller magnitude

Of larger magnitude

Sometimes B, sometimes C

Neither of these

Lyman series in the spectrum of hydrogen exists in the :

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Infra-red region

Visible region

Ultraviolet region

Both(A) and (B)

None of these

The induced current in the loop can be increased by:

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Using a strong magnetic field

Moving the loop faster

Replacing the loop by a coil of many turns

All of above

None of these

A rotating body tends to be slower, when its angular acceleration is:

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Positive

Negative

Zero

Infinity

Which one of the least multiple:

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Pico

Femto

Nano

Atto

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

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polonium uranium

uranium and radium

polonium and radium

none of these

In a heat engine, heat is supplied by the

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cold reservoir

sink

hot reservoir

none of them

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

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photon

position

antiproton

antineutrino

The transition from solid to liquid is actually from:

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Order to disorder

Disorder to order

Order to order

Disorder to disorder

None of these

When low energy photon interact with a metal,which of the following effect is likely to be taken place

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pair production

photoelectric

Compton effect

None of these

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

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5 cm

10 cm

15 cm

20 cm

Thermocouple is an arrangement of two different metals

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To convert heat energy in to electrical energy

To produce more heat

To convert heat energy into chemical energy

To convert electric energy in to heat energy

When a body is vibrating, the displacement from mean position:

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Increases with time

Decreases with time

Changes with time

None of these

Fluids resist force, This property is called

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Stiffness

Strength

Ductility

Elasticity

An electronic computer is basically a vast arrangement of electronic switches which are made from

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Resistors

Transistors

N -type crystals

P-Type crystals

Capacitors

Choose the set of physical quantities, which have both numerical and directional properties:

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Velocity, mass

Speed, acceleration

acceleration weight

Distance, force

In case of point, source of light shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

The angle of deflection of coil can be measured by the

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one method

three method

two method

none of these

When resistance of a current carrying wire increases due to rise in temperature, the drift velocity of electrons:

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Decreases

Increases

Remains the constant

Either of these

None of these

Centripetal acceleration is also called ______ acceleration

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Tangential

Radial

Angular

None of them

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?

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10^-1A

10^-2A

10^-4A

1 mA

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

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+e(v x B)

-C(V x B)

+e²(v x B)

-e(v²x B)

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