Question # 1

The water waves after striking the hurdle will:

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Reflect

Refract

Diffract

All a , b, c

Critical angle for diamond is:

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60^o

24^o

26^o

49^o

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

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SHM

Random motion

Damped motion

Circulatory motion

the range of galvanometer to measure current is:

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few amperes

few micro amperes

few milli amperes

mega amperes

As the temperature of a conductor rises, its resistance.

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Increase

Decrease

Does not change

None of these

The force on a current carrying conductor is maximum if angle between field and conductor is:

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0^o

90^o

180^o

45^o

The oscillations of a system in the presence of which force are called damp oscillations:

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Resistive force

Attractive force

Coulomb force

Both a and b

Each volt of lightening contains energy:

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4x10⁶ joules

1000 joules

1000 million joules

10 joules

The basic operations performed by a computer are:

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Arithmetic operations

Non-arithmetic operations

Logical operations

Both a and c

If a neutral body is brought near to the electroscope its leaves:

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Diverge

Contract

Shut

Remain in normal position

Mathematical formula of electromotive force (e.m.f) is:

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E = W/Q

E = Q/W

E = WQ

E = W2Q

What happen to the atomic number of an element which emits one alpha particle and a beta particles.

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Increases by 1

Stay the same

Decrease by 2

Decrease by 1

Which of the following quantities is not change during refraction of light:

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Its direction

Its speed

Its frequency

Its wavelength

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