Question # 1

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

The curie temperature of iron is about

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250°C

500°C

750°C

1000°C

The concept of direction and position are purely

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absolute

relative

absolute or relative

none of these

An L-R circuit has R = 10 Ω and L = 2 H. If 120 V, 60 Hz A.C. voltage is applied, then current in the circuit will be

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0.32 A

0.16 A

0.48 A

0.80 A

The speed of sound in a medium depends on

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The elastic property but not on the inertia property

The inertia property but not on the elastic property

The elastic property as well as the inertia property

Neither the elastic property nor the inertia property

The electrons in the outermost shell of an atom are called

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core electrons

valence electrons

high energy electrons

none of them

If the mass of the simple pendulum becomes double, its time period

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increase

decreases

remains constant

none of them

Work done along a closed path in a gravitational force is:

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maximum

Minimum

Zero

Unity

The entire wave form of sinusoidal voltage is actually a set of all the:

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Positive maximum value + V_oand negative maximum value -V_o

Posiotive maximum value +V_oand zero

Zero and negative maximum value -V_o

Any of these

None of these

A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:

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The coil is distorted

The coil is rotated

The coil is neither distorted nor rotated

Both A and B

None of these

In L.C.R series A.C. circuit, the phase angle between current and voltage is

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Any angle between 0 and +π/2

π/2

π

Any angle between 0 andπ/2

If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters,then its retardation should be

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20 ms^-2

10 ms^-2

2 ms^-2

1 ms^-2

A spectrometer is an optical device used to study the spectra from different sources of light which is

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Absorption spectra

Emission spectra

Discrete spectra

None of these

In Bernoulli's equation, the work done due to fluid is

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The equations for uniformly accelerated motion for body moving at

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Acceleration

Constant acceleration

Instantaneous acceleration

None of these

A 500 kg car takes a round turn of radius 0 m with a velocity of 36 km/h.The centripetal force is

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250 N

750 N

1000 N

1200 n

When crest of one wave falls on the crest of the other wave. This phenomenon is known as:

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Destructive interference

Diffraction

Polarization

Constructive interference

No entropy change is associated with:

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Isothermal

Adiabatic process

Isobaric process

None of them

The isothermal and adiabatic processes are employed in order

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Two isotherm and then two adiabates

Only isothermal one adibate

Only isothermal process

Only adiabatic process

What remains constant in the field of central force?

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Potential energy

Kinetic energy

Angular momentum

Linear momentum

The body is in equilibrium when it is in a state of

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Accelerated motion

Uniform motion

Rest or uniform motion

None of these

Work done by 1kg of water when it falls through the height of 10m is

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98 j

9.8 j

100 erg

9800 erg

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