Question # 1

The time required to complete on vibration is called

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frequency

total time

time period

velocity

The resistivity of a substance depends upon the

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length

mass

area

temperature

The basic circuit element in A.C. circuits are:

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Resistor and capacitor

Resistor and Inductor

Capacitor only

Both (B) and (C)

None of these

Work done along a closed path in a gravitational force is:

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maximum

Minimum

Zero

Unity

Work done by the force of friction is always

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Positive

Zero

Negative

Maximum

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

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49 rad/sec²

1 rad/sec²

0.16 rev/sec²

Both A and C

Both B and C

If the flow is incompressible and the flow is steady then the mass of the fluid through the pipe

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increases

decreases

becomes zero

is conserved

The current that flows through the coil of a motor causes:

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Its shaft to revolve

Its brushes to rotate

Motor to move

Its shafts to rotate

None of these

One mole of any substance contain

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same number of molecules

different number of molecules

may be same or different

none 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?

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4 m/s

2 m/s

8 m/s

1 m/s

The special theory of relativity is based on:

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Four postulates

Three postulates

Two postulates

One postulate

None of these

As 1 ohm x 1 farad = 1 second For MΩ x PF =

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Second

ms

μ s

Ms

An object is placed between two parallel mirrors the number of images formed is

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2

4

8

Infinite

The energy stored in a wound watch spring is

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K.E

P.E

Heat energy

Chemical energy

The magnification of a simple microscope of focal length 5cm is

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3

5

6

20

The correct unit of Kinematic viscosity in SI system is

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ra(D) s^-2

m².s^-1

g.s^-2

N .sm^-2

The maximum stress that a material can withstand is known as

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plastic point

elastic point

yield point

ultimate tensile strength

Is there any physical distinction between the valence and conduction band

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Yes

No

Very small

None of these

Angle between ray of light and the corresponding wave front is

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10°

60°

90°

120°

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

The unit of power of a lens is

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Meter

Watt

Horsepower

Dioptre

The work done by the gas during the isobaric expansion is equal to

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Area of rectangle

Area of triangle

Area of parallelogram

None of these

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