Question # 1

If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine, is (Take g=9.8 m/s²)

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9.8 m/s

19.6 m/s

39.2 m/s

98.0 m/s

The charge per unit time through any cross-section of a conductor is called

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capacitance

electric power

current

potential difference

A body is moving with constant velocity of 10 m/sec in the north east direction. Then its acceleration will be:

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10 m/sec2

20 m/sec2

30 m/sec2

Zero

In case of streamed lined flow of liquid, the loss of energy is

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Maximum

Minimum

Infinite

equal to what is in turbulent flow

The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called

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rotatory motion

motion under gravity

angular motion

simple harmonic motion

Which quantity has the same dimension as that of impulse?

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KE

Power

Momentum

Work

Tick the correct statement:

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Both the potential and potential difference is scalars

Potential is a scalar but potential difference is a vector

Both are vectors

Potential is vector but potential difference is scalar

None of these

Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is

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Less than atmospheric pressure

Much less than atmospheric pressure

Greater than atmospheric pressure

Much greater than atmospheric pressure

Both C and D

Work is a

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Scalar quantity

Vector quantity

Base quantity

None of these

We cannot utilize the heat contents of oceans and atmosphere because

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there is no reservoir at the same temperature

there is no reservoir at the temperature lower than any one of two

there is no reservoir at the temperature higher than any one of two

none of them

Rate of flow can be expressed in

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litre/sec

litre-sec

sec/litre

sec/litre-m

At what point/points in its path does a projectile have it minimum speed ?

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At the point of projection

At maximum height

All the point where it strikes the ground

None of these

The typical speed of Moon around the Earth is

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1000 ms^-1

2000 ms^-1

3000 ms^-1

4000 ms^-1

If the slits in YDS experiment are made closer, fringe spacing will:

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Increase

Decrease

Remain same

None of above

The ratio of nuclear magneton and and Bohr magneton is

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m_e/m_p

m_p/m_e

m_e/m_p

2m_p/m_ez

The mass of a body measured by a physical balance in a lift at rest is found to be m.If the lift is going up with an acceleration a,its mass will be measured as:

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m (1 - a/g)

m (1+ a/g)

m

Zero

X-rays is a type of electron magnetic radiations of much shorter wavelengths of the order of

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10^-8 m

10^-9 m

10^-10 m

10^-12 m

The relation between Cp and Cv is given by

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Cp = Cv

Cp < Cv

Cp > Cv

None of these

Trajectory of projectile is

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Ellipse

Hyperbola

Parabola

None of these

The ultimate tensile strength is

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Greatest stress, a material can endure

Stress is increased beyond the yield strength

Maximum stress, a material can with stand

None of these

Shear modulus for copper is

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20

27

44

43

If a body has zero acceleration, it means that it is

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At rest

Uniform velocity

Both

None of these

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