Question # 1

Significant figures in 0.0010 are:

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Four

Three

Two

One

The unit of conductance is

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ohm

meter

mho

ohm-meter

An L-R circuit has R = 10 Ω and L = 2 H. If 120 V, 60 Hz A.C. voltage is applied, then current in the circuit will be

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0.32 A

0.16 A

0.48 A

0.80 A

The product of cross-sectional area of the pipe and the fluid speed at any point along the pipe is called

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constant rate

volume rate

flow rate

steady rate

Heating effect of current utilized in:

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Electric motor

Electric toaster

Electroplating

Electric kettle

Both (B) and (D)

Peak value of alternative current is:

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one of its Instantaneous value

Equal to its RMS value

The same as its peak-to-peak value

Both (B) and (C)

None of these

The SI unit of current is

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watt

coulomb

volt

ampere

Dimension of mass is written as:

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M

[M]

(M)

[m]

Physics details with the study of:

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Matter

Energy

Both of them

Human body

Chock consumes externally small

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Charge

Current

Power

Potential

The free electrons in metals:

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Are in random motion and their speed depends upon temperature

Move in particular direction

Move with speed of light

Move such that their speed does not depend on their temperature

None of these

The work done by the gas during the isobaric expansion is equal to

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Area of rectangle

Area of triangle

Area of parallelogram

None of these

Amorphous solids:

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Have definite melting point

Are called glassy solids

Have no definite meting point

Both B and C

Both A and C

The ratio of output work per cycle to input energy per cycle is called:

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Entropy

Internal energy

Efficiency

None of these

If a force of 20 N makes an angle of 60° with the y-axis,then its vertical component will be

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5 N

17.32 N

10 N

8.66 N

One mole of (NH₄)₂HOP_{4 contains _ moles of hydrogen atoms:}

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1

5

6

9

In diffraction grating has feature/features like

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A glass plate

A large numbers of lines are ruled

Spacing between two lines acts as a slit

All of these

The Physical quantity which has the dimensional formula M¹T^-3 is

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Surface tension

Solar constant

Density

Compressibility

One coulomb of charge is created by

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10 electrons

1.6 x 10^-19 electrons

6.25 x 10¹⁸ electrons

6.25 x 10²¹ electrons

Torque producing anticlockwise rotation is taken as

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negative

positive

zero

both negative and positive

The relationship between Boltzmann constant K with R and N_Ais given as:

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k = RN_A

k = R/N_A

k = NR/N_A

None of these

In case when there is not total displacement and average velocity, then the motion is described by

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Variable velocity

Instantaneous velocity

Initial velocity

None of these

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