Question # 1

If a ball was thrown out of a rocket in free space, then it would.

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Accelerate away from the rocket

Remain motionless after leaving the rocket

Travel rectilinearly with constant speed

Move always parallel to the rocket

Two wires P and Q each of same length and the same material are connected in parallel to a battery The diameter of P is half that of Q What fraction of the total current passes through P.

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0.02

0.25

0.33

0.50

Which is the heat transfer mode between an object and its environment due to circular fluid motion.

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Conduction

Convection

Radiation

Mass transfer

The force on a point charge due to electromagnetic fields is called.

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Lorenz force

Gauss's force

Newton's force

Ampere's force

One weber is equal to.

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N A-1

N m-1 A

N mA-1

N m-1 A-1

Which of the following is not an electromagnetic wave.

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game rays

Ultraviolet rays

Ultrasonic waves

Microwaves

Binding energy per nucleon is.

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Greatest for heavy nuclei

Least for heavy nuclei

Greatest for light nuclei

Greatest for medium weight nuclei

The temperature of a certain substance in Celsius scale of temperature is 800 ^oC in Kelvin scale it is.

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173 K

931 K

1073 K

1193 K

Capacitance is directly proportional to

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Distance between the plates

Di electric strength

Area of the plates

Charge multiplied by the applied voltage

Which of the title for combining of notes that produce jarring effect on the ear.

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Noise

Melody

Harmony

Discord

Diffusion of gases occurs because the molecules of the

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Gas present in a higher concentration exerts a high pressure

Gases are different

Gasses attract each other

Gasses over about randomly

On which temperature scale a degree is 1/180 of the interval between the freezing point and the boiling point.

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Celsius scale

Fahrenheit scales

Rankine scale

Kelvin scale

Any frequency higher than the fundamental frequency of a sound is known as.

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Overtone

Beat

Acoustics

Shockwaves

The dimensions of force are.

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[MLT-2]

[MLT-1]

[M,-1T-2]

[M-2T-2]

A body of mass 1 kg hanging with a spring of spring constant 60 N m-1 is rotation in a horizontal circle The values of angular frequency will be.

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80 .94 Hz

89. 4 Hz

98. 4 Hz

108 . 6 Hz

The magnetic field inside a solenoid is

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Zero

Infinite

Uniform

Non uniform

Magnetic flux with a closed circuit depends

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Directly on number of turns of the coil

Inversely on number of turns of the coil

On geometry of the circuit

Nature of the charges

Which we double the voltage in a simple electric circuit, we double the

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Current

Power

Resistance

Both a and b

In modulation, low frequency signal is called

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Fluctuated signal

Loaded signal

Modulated signal

Harmonic signal

The SI unit of angular momentum is.

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kg m-1 s

kg m2 s

kg m s-1

kg m2 s-1

What is a measure of the total energy of a thermodynamics system.

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Entropy

Enthalpy

Randomness

Chaos theory

When a transverse wave is reflected on going from a more dense to a less dense medium.

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There is no phase shift

There is a 180 ^o phase shift

There is a phase shift of 360 ^o

A crest is transformed to a trough

The product of two non zero numbers is.

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A vector quantity

A unit vector

Always zero

Never equal to zero

A battery drives 50 C of charge round a circuit. The total work done is 750 J What is the electromotive force of the battery.

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0.07 V

15 V

700 V

1500 V

The half life of uranium -238 is

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1620 years

4.5 x 10⁹years

3-8 days

23.5 minutes

One gray is equal to.

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1 J-1 kg -1

1 J -1 kg -2

1 J 1 -g-1

1 j kg -2

In the experiment of production of X rays the anti cathode should be bombarded with.

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A particles

Beta particles

Electrons

Protons

What is the magnifying power of a convex lens of focal length 5 cm.

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3

5

6

20

The field in which the work done is independent of the path followed.

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Conservative field

Electric field

Magnetic field

Non conservative field

Ultrasonic sound waves

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Can be heard by a normal human ear

Can be heard with the help of hearing apparatus

Can be heard with the help of microphone

cannot be heard

The efficiency of a diesel engine is about

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15% to 35 5

355 to 40%

45% to 655

505 to 65 %

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