Question # 1

To see the minor details of the object by microscope, it should have:

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High magnifying power

High resolving power

Am objective of larger focal length

None of these

Bernoulli's equation is based upon law of conversation

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Mass

Momentum

Energy

None of these

The direction of induced current is always so as to oppose the cause which produces it. This is

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Lenz's law

Ampere's law

Faraday's law

Coulomb's law

None of these

Centripetal force performs:

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Maximum work

Negative work

Positive work

None of these

The figure 1.007276μ shows the mass of an:

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Atom

Positron

Electron

Neutron

Proton

An object undergoes S.H.M has maximum acceleration when its displacement form the means position

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maximum

zero

half of the maximum value

one third of the maximum value

To make an LED, it is impreacticable to use:

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Silicon

Gallium arsenide

Gallium arsenide phosphide

Iron

Both (B) and (C)

The force exerted by the fluid in a hydraulic pump on the piston is 10 cm², the fluid pressure on the piston is, in N/cm²

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20

200

2000

20,000

The branch of physics, which deals with the structure an properties of solids is called:

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Plasma physics

Solid state physics

Any of above

Astro physics

Which quantity has different dimension?

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Tension

Work

Energy

Torque

An induced current can be produced by:

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Constant magnetic field

Changing magnetic field

Varying magnetic field

Constant electric field

None of these

As the working substance of a heat engine completes a cycle, there is no change in:

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Internal energy

Pressure

Volume

All of these

The value of solar constant in SI system is

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1340 watt/m²

1340 m²/watt

1340 watt/m

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

The mass of the object is a quantitative measure of its

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speed

velocity

acceleration

Inertia

The atmosphere is held to the earth by

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Winds

Gravity

Clouds

The rotation of earth

The transmitter in optical fiber system contains a device called

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LED

Diode

Transistor

None of these

Distance to nearest galaxy from earth is

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10¹⁰m

10¹⁵m

10⁴⁰m

10³⁰m

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives rise to an effect called:

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Diffraction

Interference

Polarization

Dispersion

Rotational kinetic energy of a hoop is

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K.E._rot = 1/2 mV²

K.E._rot = mV²

K.E.^rot = 1/4 mV²

None of these

During a negative β-decay

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An atomic electron is ejected

A neutron in the nucleus decays emitting an electron

An electron which already present within the nucleus is ejected

A part of binding energy of nuclei is converted into electron

Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called

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tiny regions

domains

vectors

none of them

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