Question # 1

A wire of 5 m length carries a steady current if the field inside it is 0.2 v m-1 then the potential difference will be.

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0.1 V

0.5 V

1 V

5 V

Light year is a unit of

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Light

Velocity

Time

Distance

When a perfect gas is supposed to expand freely in an isolated vessel the gas has undergone.

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An increase in pressure

An increase in temperature

A change in phase

A change in entropy

Cs - 137 is a radioisotope used ot determine the thickness of the walls of steel pipes Cs 137 is chosen because it emits

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Radiowaves

Alpha particles

Beta particles

gama particles

To which law of thermodynamics, the concept of temperature is related to.

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Zeroth law

First law

Second law

Third law

If two non zero vectors are perpendicular to each other than their scalar product is equal to

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1

-1

0

infinity

The net charge on a condenser is

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Zero

Q/2

2Q

Infinity

A force of 10 N is acting along z-axis, its component along x -axis and y-axis is

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2 N , 8 N

3 N, 7 N

5 N each

Zero

Lagging of magnetic flux density behind magnetic field is known as.

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Permeability

Susceptibility

Hysteresis

Uncertainty

The mass of proton is equal to.

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1.673 x 10^-27 kg

1.673 x 10²⁷ kg

9.1 x 10-31 kg

9.1 x 10³¹ kg

A spectroscope sorts out

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Atoms

Molecules

Elements

Isotopes

The resultant of two force 3 N and 4 N making an angle 90 ^o with each other is.

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1 N

3 N

5 N

10 N

When of the following radiations are not emitted by electron transitions in atoms.

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Visible rays

Ultraviolet rays

Infrared radiations

Alpha particles

A 100 Hz A.C. is following in A 7 mH inductance What is its reactane.

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0.4 Ohms

4.4 Ohms

7Ohms

44 Ohms

Which current can pass through a capacitor continuously.

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Alternating current

Direct current

Eddy current

Pulsating current

A sample of an ideal gas may i) energy adiabatically, or ii) Expand isothermally. the net flow of heat into the gas from the exterior is.

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Positive is each case

Negative for i) and positive for ii)

Zero for i) and positive for ii)

Positive for i) and negative for ii)

Which of the following is standard scale of temperature

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Mercury scale

Platinum resistance scale

Gas scale

Alcohol scale

When a projectile reaches the highest point the vertical component of velocity becoems.

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Small

Vi cos thetha

Zero

Maximum

If a liquid does not wet a solid surface, the angle of contact is.

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Less than 90^o

Greeter than 180 ^o

90 ^o

Between 90 ^o and 180^o

Electric Heater operates on the principle of.

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electromagnetism

Electromagnetic induction

Electrolysis

Momentum

As a result of modulation, the resultant wave is called.

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Carrier wave

Modulated carrier wave

Matter wave

Energetic carrier wave

Which of the following are defects in human eye.

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Myopia

Hypermetropia

Presbyopia

All of these

The path of Gama rays in Wilson cloud chamber is

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Irregular

Dense and straight

Thin and continuous

Thin and discontinuous

A charged particles moving in a magnetic field experiences a resultant force.

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Proportional to its K.E.

In the direction of the field

In the direction opposite to its motion

In the direction perpendicular to both the field and its motion

In compound microscope image formed by the eyepiece is

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Real

Inverted

erect

diminished

The moment of inertia depends upon

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Mass of the body and its radius

Mass of the body and its angular speed

Mass and angular momentum

Mass as well as the distribution w.r.t axis of rotation

What is the necessary condition for Boyle's law to hold good.

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Isothermal

Adiabatic

Isobaric

Isochoric

Which property of waves is independent of the others.

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Amplitude

Velocity

Frequency

Wavelength

Object may acquire an excess or deficiency of charge by

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Rubbing them together

Grounding them

Applying coulomb's principle

Shielding them

Low frequency response of an amplifier is mainly limited by.

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Biasing configuration

Coupling capacitor

By pass capacitor

Input impedance

The first successful quantitative theory of atomic structure was formulate by

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David Bohm

Louis de Broglie

Neil Bohr

J Jj. Thomson

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