Question # 1

A stone is dropped from rest from the top of a tower 19.6 m high. The distance traveled during the last second of its fall is (giving g=9.8 m/s^s)

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9.8 m

14.7 m

4.9 m

19.6 m

The electric field lines start from:

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Positive charge

Negative charge

Either A and B

Neutron

An atom

When a shall explodes a mid-air, the total momentum of its fragments is

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less than the momentum of shell

equal to the momentum of shell

greater than the momentum of shell

none of them

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5μF

10μF

3μF

6μF

Deep water almost runs still when surface water flow in rivers. What does it explains

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Magnus effect

Equation of continuity

Surface energy

Bernoulli's equation

The ratio of the r.m.s value of the applied voltage to the r.m.s value of resulting a.c. is

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Impedance

Inductance

Reactance

Resistance

Chock consumes externally small

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Charge

Current

Power

Potential

A typical rocket consists of fuel

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more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

The relationship between Boltzmann constant k with R and N_Ais given as:

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k = RN_A

k =R/N_A

k = NR/N_A

None of these

The work performed on an object does not depend on:

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

In an ideal gas, the molecules have:

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Kinetic energy only

Potential energy only

Both KE and PE

None of these

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

None of these

A traveling wave has a shape of:

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Square wave

Sine wave

Parabola

hyperbola

Which of the following represents an electric current?

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C^-1

CS^-1

J.S^-1

dynes^-1

Which of the following is not an assumption of kinetic energy

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a finite volume of gas consists of very large number of molecules

the gas molecules are in random motion

collision between the gas molecules are inelastic

the size of the gas molecules is much smaller than the separation between molecules

When a position comes close to an electron they annihilate into photons such that

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each photon has energy 0.51 Me v

each photon has energy 1.02 Me v

each photon has energy 0.25 Me v

none of these

Speed of light in vacuum depends upon:

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Frequency

Wavelength

Amplitude

None of these

After alpha decay the atomic number of the atom

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increase by four

decreases by two

increases by two

decrease by four

The current of 1 ampere is passing through a conductor. The charge passing through it in half a minute is:

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One coulomb

0.5 coulomb

30 coulomb

2 coulombs

None of these

Which waves are used in sonography?

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Microwaves

Infra red waved

Sound waves

Ultrasonic waves

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

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Frequency of beat changes with time

Frequency of beat changes with location of observer

All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves

Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves

A resonance curve for RLC series circuit is a plot of frequency versus

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Voltage

Current

Impedance

Reactance

Slope of velocity-time graph represents:

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Acceleration

Speed

Torque

Work

Amplitude is the displacement of the vibrating body from:

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One extreme position to the other extreme position

Mean position any one extreme position

Both A and B are correct

None of these

Decibel is unit of

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Intensity of light

x-ray radiation capacity

sound loudness

Energy of radiation

To turn the transistor OFF, the base current is set:

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At maximum value

At zero

Either (A) or (B)

All are correct

None of correct

According to the special theory of relativity, time is

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absolute quantity

not absolute quantity

constant quantity

none of these

Uncertainty is of following type/types:

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Absolute

Fractional

Percentage

All of these

Electric lines of force

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Intersect each other

Are always parallel

Are always anti-parallel

Never intersect

None of these

The example/s of non-electrical energy to electrical is/are:

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Chemical energy

Mechanical energy

Heat energy

Both (A) and (B)

All of these

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

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