Question # 1

The instantaneous velocity of a body moving along a circle is directed

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along the radius

along the tangent

away from the circle

none of them

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

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very small energy

very large energy

frictional forces

acceleration due to gravity

Maximum density of H₂O is at the temperature

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32°F

39.2°F

42°F

4°F

The units of modulus of elasticity are

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Nm^-2

Nm

ms^-1

Pascal

Two forces each of 10 N act on a body, if the force are inclined at 30° and 60° respectively with x-axis, then x-component of their resultant is:

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20 N

13.66 N

10 N

8.66 N

Fluids resist force, This property is called

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Stiffness

Strength

Ductility

Elasticity

In n-p-n transistor, emitter base junction is kept

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reversed

forward biased

may be reversed or may be forward biased

none of these

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

Magnetic effect at a point caused due to flow a current depend upon the

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Quantity of current

Distance from current

Both the quantity of current and distance from current element

None of the all

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

Vibratory motion is always under

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Applied force

Restoring force

Periodic force

Gravitational force

A unit set is the smallest basic structure which is:

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One dimensional

Two dimensional

Three dimensional

Four dimensional

None of these

Choose the correct statement

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Rays are normal to wave front

Rays may be normal to wave front

Rays are not normal to wave front

There is no relationship between rays and wave fronts

Heat rollers make the copy

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Heated

Tone melted

Dry

All of them

A charge is 90C passes through a wire in 1 hour and 15 minutes. Wat is the current in the wire?

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10mA

20mA

15mA

25mA

The speed of flying bee is

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1 ms^-1

5 ms^-1

8 ms^-1

10 ms^-1

Monochromatic light means waves of:

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Same frequency

Same colour

Same wavelength

All of them

Base quantities are

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Scalars

Vectors

Both

None of these

Yttrium barium copper oxide (Yba₂Cu₃O₇) becomes superconductor at

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163 K

-100 °C

both and b

None of these

The terminal velocity of a 2 cm radius ball in liquid is 20 cms^{-1. What would be the terminal velocity if the radius of the ball were halved? Keeping the mass constant}

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80 cms^-1

40 cms^-1

20 cms^-1

5 cms^-1

Uniform acceleration is defined as

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Average acceleration

Instantaneous acceleration

Equal change in velocity and time

None of these

In rotational motion, the analogue of force is

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Rotational inertia

Moment of inertia

Torque

Mass

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