Question # 1

When resistance of a current carrying wire increases due to rise in temperature, the drift velocity of electrons:

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Decreases

Increases

Remains the constant

Either of these

None of these

Significant figures in 0.0010 are:

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Four

Three

Two

One

The vector is space has:

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One Component

Two Compnents

Three Components

Non of these

An electron of the hydrogen atom in the second orbit is called its:

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Ground state

Excited state

Ionized state

Any of these

None of these

A carnot cycle consists of

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One step

two step

three steps

four steps

The magnitude of chemical Effects depends upon:

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Nature of liquid

Quantity of Electricity passed through the liquid

Color of the liquid

Both (A) and (C)

Both (A) and (B)

The inkjet printer eject a thin stream of:

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Water

Oil

Ink

Any above

None of these

When a nucleus emits an alpha particle, it atomic mass decreased by

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2

1

4

3

The angle of deflection of coil can be measured by the

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one method

three method

two method

none of these

Above a certain velocity of a fluid is called

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turbulent flow

steady flow

either of them

both of them

The change of order of vectors in a dot product of two vectors:

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Changes its value

Doesn't change it's value

Changes the direction product quantity

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

The pattern of NaCI particles have a shape which is:

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Cubic

Body centred cubic

Simple cubic

Face centred

Both A and C

A spectrum which contains all wavelengths without any break is called

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Emission spectrum

Line spectrum

Continuous emission spectrum

All of them

The typical wavelength of light source in transmitter is

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1.1 μm

1.2 μm

1.3 μm

1.4 μm

The time constant is the time required to deposit the equilibrium charge

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63 times

36 times

0.63 times

0.36 times

In which process the change in internal energy of the system is zero:

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Isochoric process

Isobaric process

Adiabatic process

Isothermal process

The weight of man is an elevator descending down with an acceleration of 9.8 ms^-2will become

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Half

Double

Unchanged

Zero

The capacitance of a parallel plate capacitor does not depend upon

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Area of plates

Medium between plates

Distance between plates

Metal of the plates

A person standing near the track of a fast moving train has tendency to fall towards it because of

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Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

The work by the body is maximum when it has angle

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30^o

60^o

90^o

0^o

At what distance should a book be placed from a 50 Cd bulb so that the luminance on the book becomes 2 Im m^-2

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50 m

10 m

5 m

1 m

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