Question # 1

A particle having the mass of electron and charge of a proton is called a

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photon

position

antiproton

antineutrino

Root out of the conventional source of energy:

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Energy from biomass

Hydroelectric energy

Geothermal energy

None of these

A vector of magnitude 5 N is added to a vector of magnitude 8 N while the orientations are changeable. Range of their possible sum will be very from:

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Zero to 3 N

1 N to 13 N

13 N to 3 N

None of these

When angular acceleration is positive, the body rotates:

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Slower

Slowest

Faster

None of these

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

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F=e(V x B)

F= -e(V x B)

F= e(B x V)

Both a and c

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

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50

100

150

200

250

The product of force and time is called

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acceleration

linear momentum

angular momentum

impulse

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

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Zero

10.2 J

100 J

980 J

For making cooking utensils, which of the following pairs of properties is most suited?

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Low specific heat and high conductivity

Low specific heat and low conductivity

High specific heat and high conductivity

High specific heat and low conductivity

Work is a Quantity

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Vector

Scalar

Non-physical

None of these

A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be

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Zero

g

-g

V + g

The orbital radius as the revolving body is revolving is

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Very Smaller

Larger

Smaller

None of these

A PN junction diode cannot be use:

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As rectifier

For converting light energy to electrical energy

For getting light radiation

For increasing the amplitude of an ac signal

One electron volt is equal to

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1.6 × 10^-19 C

1.6 × 10^-16 J

1.6 × 10^-19 J

1.6 × 10^-27 J

Every crystalline solid has a melting point

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Definite

Not definite

Any

Change every time

If a machine does work at the rate of 1.0 joules in energy two 5 seconds, then its power is said to be

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0.25 watt

0.20 watt

1 watt

None of these

The modulus of elasticity of material does not depend upon

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Shape

Temperature

Nature of material

Impurities mixed

If plane polarized light is incident on the second sheet of Polaroid, the light emitted is full light when their axes are

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Parallel to each other

Perpendicular to each other

In between two positions

None of these

A wire can support a load W without breaking. It is cut into two equal parts. The maximum load that each part can support is:

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W/4

W/2

W

2 W

The dimensions [MLT^-1] refers to the quantity

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Force

Momentum

Impulse

None of these

For the measurement of temperature of the order of 400°C, we will prefer

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Hg thermometer

Alcohol thermometer

Pyrometer

Thermometer

A spectrometer is an optical device used to study the spectra from different sources of light which is

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Absorption spectra

Emission spectra

Discrete spectra

None of these

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