Question # 1

When the cyclist stop pedalling, bicycle stops due to :

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Friction

Momentum

Weight

Mass

if a body of a mass 'm' is moving with velocity 'v' then its K.E. is given by

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K.E. = 1/2 mv

K.E. = 1/2 mv2

K.E. = mv2

K.E. = 1/2 m2v

In graph referenc epoint is taken as.

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Origin

x-axis

variable

coordinates

Thermoflask is used maintain:

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Heat

Temperature

Density

Pressure

Unit of strain is

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Nm

N

Both a and b

No unit

The unit of strain is:

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Nm^-2

Pa

Newton

None

The force which keeps a body to move in a circle is called

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Gravitational force

Centripetal force

Centrifugal force

Rotational force

Which of the following do not effect evaporation?

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Temperature

Wind

Volume

Surface area of liquid

The speed of satellites in GPS is:

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8.73 kms^-1

3.87 ms^-1

32 ms^-1

3.87 kms^-1

A body is in equilibrium when its:

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Acceleration in uniform

speed in uniform

Speed and Acceleration are uniform

Acceleration is Zero.

In houses, good thermal insulation means _____________ consumption of fuel:

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Lower

Higher

Normal

None

The distance between two consecutive compressions or rarefactions in longitudinal waves is called:

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Amplitude

Wavelength

Half wavelength

1/4 wavelength

The screen of a cathode ray tube consists of a thin layer of:

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Sodium

Nitrogen

Oxygen

Phosphorus

The shape of magnetic lines of force in case of a straight current carrying conductor is:

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Eliptical

Trangular

Rectangular

Circular

1 volt is equal to:

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JC

JC^-1

JC^-2

JC^-3

Critical angle for diamond is:

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60^o

24^o

26^o

49^o

The presence of fish by the other fish can be detected by:

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Magnetic field

Electric field

Gravitational field

All of above

The half life of radium 226 is

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1600 year

1610 years

1620 years

1630 years

Radiations present in atmosphere due to the presence of different radioactive elements are:

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Cosmic radiations

Background radiations

secondary radiations

Electromagnetic radiations

Which of the following characteristic of a wave is independent of the others .

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speed

frequency

amplitude

wavelength

The intensity of lawn mover is:

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10^-1 wm^-2

10^-2wm^-2

10^-1wm^-3

10^-3wm^-2

In fixed capacitor dielectric used is:

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Paper

Metal

Mica

Paper & mica

A set of frequencies which are multiples of the fundamental frequency are called.

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Doppler effect

Nodal frequencies

Beat frequencies

Hamonics

A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.

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15 Hz

30 HZ

60 Hz

480 Hz

Inertia may expressed in

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Kg

Newton

Watt

Joule

A man of 1 kg is freefalling. The force of gravity is

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1 N

9.8 N

0.5 N

Zero

In reversible process the entropy of system.

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Remain constant

Decrease

Increase

Becomes zero

The internal energy of a piece of lead when beaten by hammer will.

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Increase

Decrease

Remains constant

Increases and then decrease

If the tension a stretched string is made four times then the velocity of wave.

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Remains same

Is halved

Becomes twice

Becomes 4 times

The potential energy to the molecules of an ideal gas is considered to be.

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Maximum

Zero

1/2 kx²

1/2 kx

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

The largest satellite system is managed by

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116 countries

126 countries

136 countries

140 countries

A man of 5000 kg moves with an acceralation of 1 ms-2 force acting on it is.

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5 N

500 N

50 N

5000 N

Energy stored in inductor is.

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1/2 L I²

1/2 LI

1/2 L2I

1/2 L2I2

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

At resonance, the behavior of R-L-C series circuit is.

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Resistive

Capacitive

Inductive

Modulative

A.C. Generator based upon the

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Lenz's law

Maxwell's relation

Faradays law of electromagnet induction

Mutual induction

An ideal current source shall have resistance

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Zero

Finite but not zero

Infinite

Depend upon requirement

A one microfarad capacitor of a TV is subjected to 4000 V potencial difference.The energy stored in capacitor is:

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8 j

16 j

4 x 10^-3j

2 x 10^-3j

Xc =

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1/2πfc

2πfc

2π/fc

fc/2π

Heat energy is converted into electrical energy.

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Solar cells

thermocouples

Electric generators

None of above

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola

A current carrying conductor experience maximum magnetic force in a uniform magnetic field when it is placed.

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Perpendicular to field

Parallel to field

At an angle of 60 ^o to the field

None of these

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m