Question # 1

One cannot see through fog because

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Fog absorbs light

The refractive index of fog is infinity

Light suffers total reflection at the droplet in a fog

Light is scattered by the droplets in fog

The average binding energy of a nucleon inside an atomic nucleus is about

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8 MeV

8 eV

8 Joules

8 ergs

In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19 C. The number of excess electrons on the drop is

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3.9

4

4.2

6

Huygen's wave theory of light cannot explain

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Diffraction

Interference

Polarization

Photoelectric effect

With the increase of temperature viscosity

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Increase

Decrease

Remains same

Doubles

What will be the duration of the day and night (in hour) if the diameter of the earth is suddenly reduced to half its original value the mass remaining constant?

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12

6

3

2

A voltmeter has resistance of 2000 ohms and it can measure up to 2V. If we want to increase its range to 10V then required resistance in series will be

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2000 Ω

4000 Ω

6000 Ω

8000 Ω

The average power dissipation in a pure capacitor in AC circuit is

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1/2 CV²

CV²

2CV²

Zero

At constant volume temperature is increased then

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Collision on walls will be less

Number of collisions per unit time will increase

Collisions will be in straight lines

Collisions will not change

In a common base transistor circuit the current gain is 0.98.On changing the emitter current by 5.00 mA, the change in collector current is:

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0.196 mA

2.45 mA

4.9 mA

5.1 mA

If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will

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Increase

Decreases

Remain the same

First 'A' then 'B'

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