Question # 1

Aerodynamics is a branch of

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Hydrodynamics

Thermodynamics

Both of them

Statics

Boyle's law is applicable in

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Isochoric process

Isothermal process

Isobaric process

Isotonic process

Pressure may be define as _______ per second per unit area:

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Change in force

Change in momentum

Change in energy

Work done

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is

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25

225

625

1250

A square loop of wire is moving through a uniform magnetic field. The normal to the loop is oriented parallel to the magnetic field. The emf induced in the loop is:

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Zero

Of smaller magnitude

Of larger magnitude

Sometimes B, sometimes C

Neither of these

No spark plug is needed in

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petrol engine

diesel engine

both of them

none of them

The example/s of non-electrical energy to electrical is/are:

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Chemical energy

Mechanical energy

Heat energy

Both (A) and (B)

All of these

A particle moving uniformly along circle its projection along diameter performs

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Linear motion

Projectile motion

SHM

Rotatory motion

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

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modification

voltage

current

resistance

Tick the correct statement:

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Both the potential and potential difference is scalars

Potential is a scalar but potential difference is a vector

Both are vectors

Potential is vector but potential difference is scalar

None of these

Unit of impulse in

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Newton

Kg m

Kg m/s

Joule

The magnitude of potential barrier for Ge is

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0.7 v

0.3 V

7v

3 v

Two vectors have unequal magnitudes can their sum be zero ?

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Yes

No

Can be zero

None of these

A 50 kg man with 20 kg load on his head climbs up 20 steps of 0.25 m height each.The work done in climbing is

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5 J

350 J

100 J

3430 J

N-type crystal is

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Neutral

Positively charged

Negative charged

None of these

In addition and subtraction

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Percentage uncertainties are added

Percentage uncertainties are subtracted

Absolute uncertainties are added

Absolute uncertainties are subtracted

A fly wheel of moment of inertia 500 kgm²is rotating at angular speed of 6 rad/s. What torque is needed to stop wheel in 3s

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500 Nm

1000 Nm

1500 Nm

2000 Nm

If the temperature difference between hot and cold body is greater the heat engine is:

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Not efficient

Less efficient

More efficient

NOne of above

Inspite vibrations the force which hold the atoms in their ordered form is

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Vander vall force

Cohesive force

Adhesive force

None of these

Examples of polymers are

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Polythene

Polystyrene

Nylon

All of them

Unit of universal gas constant is SI is:

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W K^-1 mol^-1

J/Nk^-1 mol^-1

Jk^-1 mol^-1

erg K^-1 mol^-1

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