Question # 1

Radioactivity is the phenomenon associated with the.

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Transition of radiowaves

production of alpha particles only

Decay of nucleus

Reception of radio waves

Self inductances of solenoid is

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Directly proportional to the current flowing through the wire

Directly proportional to its length

Inversely proportional to area of corss section

Directly proportional to number of turns

Which incapability of the materials is represented by the phenomenon of hysteresis.

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Magnetic saturation

Low susceptibility

Retrace the path

Orientation

The horizontal range is equal for the angles.

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30 ^o and 45 ^o

30 ^oand 60 ^o

45 ^o and 90 ^o

60 ^oand 75 ^o

Which phenomenon is responsible formation of shadows.

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Interference of light

Diffraction of light

Polarization of light

Propagation of light

A straight wire carrying current will experience a force when place in uniform magnetic field if

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The current and field are parallel

The current and field are at an angle

the current and field are parallel in opposite directions

All of the above

The strength of the magnetic field around the current carrying conductor is

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Smaller near the conductor

Greater near the conductor

constant everywhere

Changing everwhere

A given quantity of an ideal gas is at pressure P and temperature T What is the isothermal bulk modulus of the gas.

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2/3 P

P

2P

3/2 P

Where is the velocity of electrons maximum in a diode.

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Near the cathode

Near the anode

In the space ini between the two elecrode.

It is same throughout the tube

Angular momentum of a body under a central force is

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Zero

Maximum

Minimum

Constant

A spectroscope sorts out

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Atoms

Molecules

Elements

Isotopes

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

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Permeability

Susceptibility

Hysteresis

Uncertainty

Which is the correct statement regarding the nature of light.

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It has wave nature

It has particle nature

It has both wave and particle nature at the same time

It has wave nature sometime and particle nature at some other time.

If we place oure hand below a lighted lamp we feel warmer due to.

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Conduction

Convection

Radiation

None of these

The process by which nuclei emit a ,b and gama rays in order to attain stability is called.

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Radioactive disintegration

Radio activity

B decay

Radioactive transmulation

The force experienced by a unit positive charge at that point placed in an magnetic field is known as.

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Electric field intensity

Electric flux

Electric potential

Electric dipole

Which vector gives the displacement from one point another in space.

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Null vector

Position vector

Unit vector

Distance vector

The sum of positive and negative peak values are usually written as.

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rms value

p-p value

Peak value

Instantaneous value

Plane polarized light can be produced by

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Reflection

Refraction

Scattering of light

All of these

Planets move around the sun due to.

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Centrifugal force

Centripetal force

Gravitational pull between them

Frictional force between them

Which of the following factor will not affect the speed of sound i a medium.

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Temperature

Pressure

Humidity

Mass

What is the value of earth's magnetics fields.

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5 G

50 G

100 G

500 G

Which type of amplifier causes minimum drain of power supply.

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Class -A

Class -B

Class-C

Class -AB

Which of the following is a clinical thermometer.

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Gas thermometer

Mercury thermometer

Alcohol thermometer

Radiation thermometer

Which form of electromagnetic radiation is used in RADAR.

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Long wavelength ultraviolet waves

short wavelength microwaves

short wavelength infrared wave

Long wavelength radiowaves

Light travels perpendicular to electric and magnetic fields and requires no material medium, was proposed by.

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Einstein

Max planck

Maxwell

Bragg

Who was the most outstanding theoretical physicist.

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Daniel

Maxwell

Ampere

Young

The actual gas can behave like an ideal gas at

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Low density and high pressure

High density and high pressure

Low density and low pressure

High density and low pressure

One radian is equal to.

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0.1 Gy

0.01 Gy

0.001 Gy

0.0001 gy

Who described an ideal heat engine in 1840

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Boyle

Saadi Carnot

Kelvin

Currie

Two electrons approach each other their relative velocity will be.

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Zero

c

c/2

Infinity

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