Question # 1

In the force applied is parallel to the direction of motion, then work done is:

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Maximum

Minimum

Zero

None of these

Alternating current can not be measured by D.C. ammeter because

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A.C. can not pass through D.C. Ammeter

A.C. changes direction

Average value of current for complete cycle is zero

D.C. Ammeter will get damaged

In which process the condition for the application of Boyle's law on the gas is fulfilled

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isochoric process

adiabatic process

isothermal process

none of them

The diameter of an atom is of the order

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10^-125m

10^-11m

10^-10m

10^-9m

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

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Non-uniform density

uniform density

high density

low density

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

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Ultra red region

Visible region

Ultraviolet region

Any of these

None of these

With increase of temperature, the viscosity of liquid and gases

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Increases for both

Decreases for both

Increases for liquids and decreases for gases

Decreases for liquids and increases for gases

Crests and troughs are formed in:

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Longitudinal waves

Transverse waves

Both of these

None of these

When the object lies between F and 2F, the image formed by is formed at:

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Real

Virtual

Diminished

Erect

Which one of the following physical quantities changes with relativistic speed

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Length

Mass

Time

All of the above

The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of

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2 cm/s

20 cm/s

200 cm/s

2000 cm/s

How many electrons are in one Coulomb ?

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6.2 × 10^-23

6.2 × 10^-21

1.6 × 10^-19

Zero

For interference to occur the two light waves should be:

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Of two different frequencies

Coming from opposite directions

Of high intensity

Monochromatic

There are earth stations which transmit signals to satellites and receive signals via satellite from other countries are

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200

Over 200

400

500

Deep water almost runs still when surface water flow in rivers.What does it explains

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Magnus effect

Equation of continuity

Surface energy

Bernoulli's equation

The ballistic missiles are useful for

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Short ranges

Long ranges

Medium ranges

None of these

Total mass when silver coins are added to box as 2.2 kg, 0.01001 Kg and 0.01002 Kg correct to appropriate precision

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2.3 Kg

2.2 Kg

2.43 Kg

2.67 Kg

Newton's rings are formed due to

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Refraction of light

Diffraction of light

Interference of light

None of these

Ordinary light has components of vibrations in all possible planes. Such light is

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Unpolarized light

Polarized light

Both

None of these

The state of rest and state of motion are

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Irrelevant

Relative

Both

None of these

Two forces are acting together on an object.The magnitude of their resultant is minimum when the angle between the force is:

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0°

60°

120°

180°

The number 134.7 should be written as

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13.47 × 10²

1.347 × 10²

13.47 × 10³

None of these

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