Question # 1

Distance traveled by a body falling from rest in the first, second and third second is in the ration of

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1 : 2 : 3

1 : 3 : 5

1 : 4 : 9

None of the above

Static electricity is produced by the transfer of:

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Electrons

Protons

One fluid

Two fluids

None of these

In a three phase a.c. generator, there are

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2 coils

3 coils

1 coild

No coil

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is

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0.5 J

2 J

0.25 J

1 J

Photoelectrons are emitted when ultraviolet light falls on:

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Casium

Silver

Potassium

Any of these

None of these

Least distance of distinct vision of an old man possibly becomes:

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A little less than 25 cm

A little more than 25 cm

Much less than 25 cm

None of these

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

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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

A shunt resistance parallel to the galvanometer is used to convert it into

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avometer

millimeter

voltmeter

none of these

Absolute zero is considered as that temperature at which:

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All liquid become gases

All gases become liquid

Water freezes

None of these

At resonance, the impedance of RLC series circuit is

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Maximum

Zero

Minimum

Determinate

Which of the following is not an example of intertial frame

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a body placed on the surface of earth

a body placed in a car moving with uniform velocity

a body placed in a car moving with same acceleration

none of these

A body of mass 0.031 kg attached to one end of a spring of spring constant 0.3 N/m, then time period of spring mass system will be:

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1.5 sec

2.0 sec

2.3 sec

2.5 sec

The materials in which valence electrons are bound very tightly to their atoms and are not free, are known as

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conductors

insulators

semi-conductors

all of them

Acceleration produced in a body by a force varies

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inversely as the applied force

directly as the applied force

directly as the mass of the body

none of them

The information from far side of the universe are gathered by

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Radio telescope

Microscope

Telescope

Spectro scpe

Examples of crystalline solids are:

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Cooper

NaCl

Zirconia

Both (A) and (B)

All of these

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

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restoring force

periodic force

centripetal force

resistive force

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

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Ve

V/e

e/V

2Ve

What is another name for laminar flow?

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streamline

unsteady flow

turbulent flow

both (a) and (b)

The law of electromagnetic induction is related to:

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Coulomb

Ampere

Faraday

Lenz

None of these

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

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Equal to 1

Less than 1

Greater than 1

Infinity

Most practical application of electricity involve

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Charges at the rest

Charges in the motion

Electrons at rest

Atoms in motion

Molecules in motion

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

None of these

A body with frequency of would complete one vibration in:

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f seconds

1/f seconds

1 second

f²second

Resistance of a conductor is increased, the currant will

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Decrease

Increase

Remain the same

None of these

The first series which was identified in the spectrum of hydrogen is called:

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Lyman series

Balmer series

Paschen series

Brackett series

Pfund series

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

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negative charges

positive charges

protons

electrons

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

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longitudinal waves

transverse waves

non-mechanical waves

none of them

Force is a:

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Scalar quantity

Base quantity

Derived quantity

None of these

Sadi carnot described an ideal heat engine in

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1820

1840

1860

1880

A condenser of capacity 50μF is charged to 10 V.The energy stored is

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1.25 x 10^-3J

3.75 x 10^-3J

2.5 x 10^-3J

5 x 10^-3J

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