Question # 1

Parallel vectors of same magnitudes:

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Are equal

Are unequal

When added give the some equal to zero

Give the answer equal to zero

The reverse saturation current in a PN junction diode is only due to

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Majority carriers

Minority Carriers

Acceptor ions

Donor ions

Neutrons are

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positive charge

negatively charged

massless

neutral

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

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The charge in the plates reduces and potential difference increase

Potential difference between the plates increase, stored energy decreases and charge remains the same

Potential difference between the plates decreases and charge remains unchanged

None of the above

Static electricity is produced by the transfer of:

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Electrons

Protons

One fluid

Two fluid

None of these

The force which opposes the applied force producing the displacement in the spring is called

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restoring force

periodic force

centripetal force

resistive force

The error may occur due to:

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Negligence

Faulty apparatus

Inappropriate method

all of these

The natural arrangement of colours in the spectrum of white light spectrum is

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VIBGYOR

ROYBGIV

ROYBIGV

BIGROYV

None of these

In a moving coil galvanometer, the deflecting couple depends upon

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area of the coil

number of turns of coil

value of magnetic field

all of the above

If a force of 0.05 N produces an elongation of 20 mm in a string, then its spring constant will be:

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250 N m^-1

25 N m^-1

2.5 N m^-1

None of these

Branch of physics which deals with the study of stars and galaxies is called:

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Solid state physics

Astrophysics

Molecular physics

Chemical physics

If 5000 lines/cm are ruled on a diffraction grating, the element is:

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5 x 10^-5m

2 x 10^-6m

5 x 10^-6m

2 x 10^-5m

When a mirror of a Michelsion's interferometor is moved a distance of 0.5 mm, 2000 fringes are observed, the wavelength of the light used is

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5000 mm

5000°A

500 cm

2000°A

Domains are present only in

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Diamagnetic material

Para magnetic material

Ferromagnetic material

All of these

The resolving power of telescope depends on

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Focal length of eye lens

Focal length of objective lens

Length of the telescope

Diameter of he objective lens

An electric fan rotating in 3 revs^-1 is switched off. It come sot rest in 18.0 sec. Find the value of acceleration which is

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+ 1.267 revs^-2

0027 revs^-2

- 0.167 revs^-2

- 0.152 revs^-2

Torque of a force is a vector quantity, its direction is determined by

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Right hand rule

Knowing the direction of F

Knowing the position of origin

none of these

The weight of the body at the centre of the earth is.

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Infinite

Zero

Slightly less than that at the equator

Slightly more than that at the equator

The resistance of operational amplifier between inverting and non-inverting terminal is of the order of:

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Few Ohms

Mega Ohms

Few Kilo Ohms

Micro Ohms

When an atom is surrounded by large number of atoms their the energy levels are

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Distinct

Very close

Energy band

None of these

Photo cells is a device which convert light into:

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Wave nature

Particle nature

Particle wave nature

Dual nature

In Compton effect, it was considered that X-rays consist of:

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Electrons

Positrons

Photons

All of these

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