Question # 1

The S.I unit of Spring constant is:

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Nm

N

Nm-1

Ns

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

An object is 14 cm is front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

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4.1 cm

8.2 cm

9.9 cm

20 cm

What is the voltage across a 6 Ω resistor when 3 A of current passes through it:

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2 V

9V

18 V

36 V

If the potential energy of none coulomb charge is one joule then its potential will be:

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5 volt

2 volt

3 volt

1 volt

The frequency of silent whistle is:

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20,000 Hz - 25000 Hz

2000 Hz - 25000 Hz

200 Hz - 2000 Hz

25000 Hz

The motion in which the friction reduces the mechanical energy of the system as times passes and the amplitude of motion reduces is called:

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SHM

Randum motion

Damped motion

None of these

In A.C. generator flux will be zero if coil is to the field.

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90^o

45^o

Parallel

Inclined

Digital technology is used in:

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Bulb

Radar

Electric motor

All of these

Watt is equal to:

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Coulomb per second

Newton per second

Volt per second

Joule per second

The emission of electron from the surface of hot metal is called:

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Ionization

Conduction

Thermionic emission

Convection

The formula of time period of simple pendulum is:

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T = 2π √L/g

T = 2π (L/g)

T = 2π√1/g

T = 1/2π √L/g

Sun light consist of ____________ colour

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6

7

5

2

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