Question # 1

The consumption of energy by a 60 W bulb in 2 s is

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0.02 J

30 J

60 J

120 J

Light rays after passing through is convex lens.

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Bend away from principal axis

Bend towards participial axis

Remain unriveted

Travel parallel to the principal axis

Which of the following quantity is defined in terms of the rate of change of electric displacement field.

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Conventional current

Electronic current

Displacement current

Pulsating current

The magnetic field inside a solenoid is

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Zero

Infinite

Uniform

Non uniform

Which of the following properties is not exhibited by X-rays.

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Interference

Diffraction

Polarization

Deflection of electric field

Difference in the density of two medium when waves are passing from one into another medium always results in the change in.

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Wave speed

Wave direction

Both speed and direction

Wave frquency

A horizontal force of 15 N accelerates a 4 kg object rom rest along a horizontal surface at a rate of 3 m s-2 At the end of 2 s the objects momentum will be.

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12 kg m s-1

24 kg m s-1

30 kg m s-1

45 kg m s-1

Select the one that is not a donar

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P

AS

Sb

In

Gas exert pressure on walls of the visual because gas molecules.

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Posses momentum

Have finite volume

Collide with each other

Obey gas laws

Who introduced the concept that an atom possesses quantized energy levels.

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Fermi

Newton

Bohr

Einstein

All particles, of a wave front vibrate

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In same phase

In opposite phase

Upward down

Left and right

Which law states that two given samples of an ideal gas at the same temperature pressure and volume contain the same number of molecules.

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Charles law

Avogadro's

Boyles law

Boizmann law

For polarization , the direction of oscillation has to be perpendicular to the direction of travel sound waves are longitudinal waves so they cannot be.

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Reflected

Deflected

Diffracted

polarized

Which of the following are particle accelerators.

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Cyclotrons

Synchrotrons

Linear accelerators

All of the above

When two identical travelling waves are superposed, velocity of the resultant wave

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Remains unchanged

Decreases

Increases

Become zero

The core of a transfer is made of iron because

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Iron is a good electric material

Iron is cheaper than copper

Iron is easily magnetized and demagnetized

Iron makes a good permanent magnet

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

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Carrier wave

Modulated carrier wave

Matter wave

Energetic carrier wave

When a helium atom loses an electron it becomes.

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An a particle

A proton

A positive helium ion

A negative helium ion

Which is not the strongest and the most familiar type of magnetism.

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Diamagnetism

Para magnetism

Ferromagnetism

All of these

The SI unit of mutual induction a

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Vs-1 A-1

V m -1 A-1

Henry

Tesla

On which factor mutual induction of two coils does not depends upon.

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Number of turns of the coils

Area of cross section of the coils

Closeness of the coils

Shape of the coils

The radius of first Bohr's orbit for hydrogen atom is.

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0.53 m

0.53 nm

0.053 nm

0.53 mm

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

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Null vector

Position vector

Unit vector

Distance vector

When temperature increases, frequency of an organ pipe

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Decreases

Increases

Remain the same

Become zero

Which parameter determines the brightness of a light source sensed by an eye.

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Light energy entering the eye

Wavelength of light

Total radiant flux entering the eye

Total luminous flux entering the eye

Which instrument measures the magnification of a telescope.

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lactometer

dynamometer

Wattmeter

Ammeter

What is world's average surface air temperature.

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5 ^oC

10^oC

15 ^oC

20 ^oC

Which electrical component may be used to store electrical energy in a time delay circuit

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Capacitor

Light dependent resistor

Resistor

Thermistor

The result of the alpha particle scattering experiment gave evidence for which of the following.

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Nuclear fusion

Radio active decay

Existence of isotopes

Nuclear atom

The chain reaction is controlled by a series of rods usually made of.

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uranium

Cadimium

Boron

Steel

The cause of production of eddy current is the

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Current flowing in a conductor

Current flowing in a insulator

Motion of a conductor in a varying magnetic field

Motion of an insulator in a varying magnetic field

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