Question # 1

Diffraction is a special type of.

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Polarization

Interference

Dispersion

Scattering

The energy supplied in charging a capacitor resides after the charging in.

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The magnetic field

The electric field

the battery

The moving conduction charges

What happens to internal energy of a piece of lead when hammered.

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Increases

Decreases

Remains unchanged

Becomes zero

The SI unit of absorbed dose in.

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Bel

Weber

Rem

Grey

Which one of the following gates in a a universal gate.

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OR

AND

NOT

NAND

The energy transported by a wave is proportional to the square of the.

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Wavelength of the wave

Period of the wave

Amplitude of the wave

Frequency of the wave

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

The magnitude of resultant of three forces is 3. Its x -component is 2 and y component is 1, then its z-component will be.

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1

2

3

4

Angular acceleration is produced due to

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Centripetal force

Torque

Force

Mass

Which of the following statements concerning G and g is true.

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g is scalar white g is a vector

g is inversely proportional to the mass of the planet

g is independent of the mass of the planet

both G and g have the same units

With high frequencies capacitive reactance

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Increases

Decreases

Becomes double

Becomes half

Dioptre is the term used for describing the

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Intensity of light

Density of air

Power of light

Refractive index

The current passing through the switch s will be

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Zero

3 A

4.5 A

10 A

Who explained Browian movement quantitatively.

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Issac Newton

albert Einstein

James Maxewll

Robert Brown

If length of second pendulum becomes four times than its time period will become

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Two times

Four times

Six times

Eight times

Magnetic fields do not interact with

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Stationary electric charges

Stationary permanent magnets

Moving electric charges

Moving permanent magnets

A transistor can be used as

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Oscillator

Amplifier

Switch

Both a and c

According to kinetic energy of gases one assumes that the collisions between the molecules are.

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Perfectly elastic

Perfectly inelastic

Partly elastic

Partly inelastic

Which law states that magnetization is inversely proportional to temperature for a fixed value fo the field.

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Curie's law

Voltmeter

Ammeter

Wattmeter

LASER is a device which can produce

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Monochromatic beam of light

Coherent beam of light

An intense beam of lgiht

All of these

In de Brogile model electron orbit must form

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Spectrum

Wave packets

Franhoffer lines

Clouds

A Spectrum of radiation in which the quantity being studied, such as frequency or energy takes on discrete values is called.

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Continuous spectra

Band spectra

Discrete spectra

Normal spectrum

A mercury in glass thermometer and thermocouple thermometer are both calibrated using the same fixed point of 0 oC and 100 oc when both temperature are used to measure the temperature of a body the temperature measured on both thermometers will be exactly the same

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For all temperatures between 0 oC and 100 o C only

Only are the fixed points

For all temperatures at all times

When converted to the Kelvin scale

Mean life of a radioactive sample is 100 s its half life will be

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0.693 s

1 s

6.93 s

69.3 s

The critical angle for a beam of light passing from water into air is 48.8 o This mean that all light rays with an angle of incidence greater than this angle will be.

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Absorbed

Totally reflected

Partially reflected and partially transmitted

Totally transmitted

Which Muslim Scientist is regarded as father of optics.

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Ibn al Haithem

Al khawarizmi

Nasir al Din Al tusi

Ibn Musa al khawarzmi

A expression for total work done by the battery to move charge against an induced emf is equal to.

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W = LI2

W = 1/2 LI

W = 1/2 L3I

W = 1/2 LI2

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 %

Which of the following is believed to be carrier o nuclear forces.

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Lepton

Meson

Bason

Baryon

The electric heater takes a current of 4 A from a 250 V supply . How long would it take the heater to convert 400,000 J of electric energy.

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100 s

200 s

400 s

750 s

Two convex lens focal length 'f' use din combination become telescope. When the distance between them is.

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1

4f

2f

f/2

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