Question # 1

Brownian motion increases due to

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Increase in size of Brownian particle

Increase in temperature of medium

Increase in density of medium

Increase in viscosity of medium

dimensions are the same for:

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Work and energy

Force and weight

None of these

Both a and b

The absolute temperature of the tripple point of water is

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100°C

4°C

373 K

273.16 K

The counter, which also provides the power to the G.M. tube is called:

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Thin mica window

thin glass window

Airy window

Wooden window

None of these

The size of the domain is such that they can contain

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10²to 10⁴atoms

10⁴ to 10⁸atoms

10⁸to 10¹²atoms

10¹²to 10¹⁶atoms

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

A force of 5 n is acting Y-axis. Its component along X-axis is:

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7 N

5 N

Zero

10 N

A ball is dropped vertically down and it takes time t to reach the ground. At time t/2

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The ball had covered exactly half the distance

The velocity of the ball was V/3 where V is the velocity when it reached the ground

The ball had covered less than half the distance

The ball had covered more than half the distance

The value of the potential difference across the depletion region for the case of germanium is

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0.3 V

0.5 V

0.7 V

0.9 V

Thermistors are prepared under

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High pressure and low temperature

High pressure and high temperature

Low pressure and low temperature

Low pressure and high temprature

None of these

The practical application of the phenomenon of Mutual induction is

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Transformers

Generator

Motor

All of these

When m₂>> m₁and V_{2 = 0 then result of their velocities}

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V₂= 0 and V₁= V'₁

V'₁= -V₁and V'₂= 0

V₁= V₁and V₂= 0

None of these

Finger prints on paper are identified by sprinkling fluorescent powder on it and observing it under

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Sun light

Sodium light

Infrared

UV

The maximum drag force on a falling sphere is 9.8 N, its weight is

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1 N

9.8 N

4.9 N

None of these

Plane microwaves are incident on a long slit having a width of 5 cm.The wavelength of the microwaves if the first minima is formed at 30° is

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25 cm

5 cm

2.5 cm

5 mm

The dimensions of force are

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[MLT^-1]

[M^oLT^-2]

[MLT^-2]

[ML⁰T^-2]

The process of liquefaction and evaporation of a substance performed slowly are

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Reversible

Practically reversible

Not reversible

None of these

In a container having water filled up to a height h,a hole is made in the bottom.The velocity of water flowing out of the hole is

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Independent of h

Proportional to h^1/2

Proportional to h

Proportional h²

In YDS experiment, condition for constructive interference is that path difference is equal to

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nλ

mλ

(n + 1/2)λ

(m + 1/2)λ

In case of interference fringes:

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Energy is destroyed at dark

Energy is created at bright fringes

Energy is transferred from dark to bright ringes

None of these

The typical speed of 100 meters dash

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2 ms^-1

4 ms^-1

10 ms^-1

12 ms^-1

If we go from the equator to a pole, the value of g

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Increases

Decreases

Remains unchanged

First increase and then decrease

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