Question # 1

Average value of A.C voltage during one cycle is

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1

Zero

Maximum

Variable

The surface destiny of charge is defined is:

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Charge per volume

Mass per volume

Charge per area

Mass per area

Both (B) and (C)

The relation V = IR represents

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Ampere law

Faraday's law

Ohm's law

Len's law

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

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Non-uniform density

uniform density

high density

low density

γ-rays behave like a particle because they explain the

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Compton effect

Photoelectric effect

Pair-production

all the above

At O° K which of the following properties of a gas will be zero?

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Kinetic energy

Potential energy

Vibrational energy

Density

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

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1840 KeV

1/1840 KeV

1 KeV

920 KeV

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

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Longitudinal waves

Transverse waves

Water waves

Complex waves

A galvanometer is an instrument used to

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measure voltage across a circuit

detect current in a circuit

measure current flowing through a circuit

none of these

The electric field lines start from

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Positive charge

Negative charge

Either A or B

Neutron

An atom

An object in SHM will have maximum speed when its displacement from equilibrium position is:

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Infinity

Maximum

Zero

Minimum

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

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Greater than

Smaller than

Equal to

None of these

The horizontal component of a projectile moving with initial velocity of 500 ms^-1at an angle 60° to x-axis is

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500 ms^-1

1000 ms^-1

250 ms^-1

Zero

In case of metallic conductors, the change carries are:

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Protons

Electrons

Antiprotons

Positrons

Both (A) and (B)

In a transistor, collector current is controlled by

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Collector voltage

Base current

Collector resistance

All of the above

In RLC series circuit, resonance occurs when

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X_{L > Xc}

X_{L < Xc}

X_{L = Xc}

None of these

No spark plug is needed in

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petrol engine

diesel engine

both of them

none of them

The force which maintain the strict long-range order between atoms of a crystalline solid is the:

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Nuclear force

Cohesive force

Adhesive force

Coulomb force

None of these

Laws of reflection and refraction can also be explained by:

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Particle nature of light

Quantum nature of light

Wave nature of light

Complex nature of light

When the bob of simple pendulum is at mean position, its K.E will be

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maximum

minimum

zero

all of them

An ideal choke (used along with fluorescent tube) would be

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A pure resistor

A pure capacitor

A pure inductor

A combination of an inductor and a capacitor

Acceleration of body executing SHM is always directed towards

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Extreme position

Mean position

Along the direction of motion

None

Amorphous solids are also called as

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crystalline solids

polymeric solids

glassy solids

any one of them

The results of mechanical tests are usually expressed in terms of

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stress

strain

stress and strain

neither strees nor strain

If x-component of a vector is -3 N and y-component is 3 N, then angle of resultant vector will x-axis is:

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45°

315°

135°

225°

If the stress increased beyond the elastic limit of the material. the deformation produced in the material will be

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permanent

temporary

either of them

none of them

When heat is added into the system then change in entropy is

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negative

positive

zero

any one of them

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

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1

0.2

2

0.1

Work done is independent of path followed in _______

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Gravitational field

Magnetic field

Electric field

All of these

Which of the following is a characteristic of an ideal fluid?

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it is non-viscous

it is incompressible

it's motion is steady

all of the above

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

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waves

beat

interference

resonance

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