Question # 1

The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:

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5 rad/sec²

-10 rav/sec²

-10 rad/sec²

-5 rav/sec²

Momentum is a parameter associated with

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wave motion

particle motion

neither wave nor particle motion

none of these

Bernoulli's equation is important in the field of

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Electrical circuit

Magnetism

Photoelectric effect

Flow of fluids

The number of countries who manage the largest satellite system is:

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3

24

126

200

Velocity of particle executing SHM will be maximum at

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Extreme position

Mean position

b/w mean and extreme

None

When velocity of moving body is doubled, the quantity which is also doubled is its:

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K.E.

Acceleration

Momentum

P.E.

In the phenomenon of hysteresis

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magnetism leads the magnetising current

magnetism lags behind the magnetising current

meganetism goes along the magnetising current

none of them

The Nobel Prize on the explanation of photoelectric effect was awarded to:

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Max. Planck

Maxwell

Bohr

Rutherford

None of these

The body of physics involves

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Structure of space and time

Interaction of electromagnetic radiation with matter

Both of them

Chemical Changes

The distance covered by a body in unit time is called.

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Displacement

speed

Velocity

Both B and C

In a heat engine, heat is supplied by the

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cold reservoir

sink

hot reservoir

none of them

An accurate measurement is the one which has

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Percertainity

Less percentage uncertainty

Less fractional uncertainty

b and c

The distance between the concentric wavefronts is

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half wavelength

one wavelength

one and a half wavelength

none of them

A line normal to the wavefront including the direction of motion is called

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perpendicular line

parallel line

a ray of light

none of them

The laser light used in an optical fiber system has a wavelength equal to

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3μm

5μm

1.3μm

6μm

A cell of negligible resistance and e.m.f 2 V is connected across a series combination of 2,3 and 5 ohms. The p.d. across the 3 Ω resistor is

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0.6 V

1/3 V

2/3 V

4/3 V

Newtons second law gives the measures of

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Acceleration

Force

Momentum

Angular momentum

The principle of rocket motion is based on the

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First law of motion

Second law of motion

Third law of motion

None of these

The viscosity of fluid is described by

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Resistive forces of fluid

Frictional effect between different layers of a fluid

Flowing speed of fluid

None of these

Which of the following is dimensionally correct

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Pressure = energy per unit area

Pressure = energy per unit volume

Pressure = force per unit volume

Pressure = Momentum per unit volume per unit time

Can you add zero to a null vector ?

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No

Yes

Yes in some cases

None of these

A grating with high resolving power can distinguish ______ difference in ______

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Smaller, amplitude

Greater, wavelength

Smaller, wavelength

Greater, intensity

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