Question # 1

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

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RMS value

Instantaneous value

Valued average over a cycle

Zero

Both (B) and (C)

A physical system under going forced vibrations is known as

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Simple harmonic oscillator

Compound harmonic oscillator

Physical harmonic oscillator

driven harmonic oscillator

A mass spectrograph sort out

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molecules

atoms

elements

isotopes

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

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108 g

10.8 g

0.8 g

108/0.8 g

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

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546 K

273 K

546°C

273°C

How much force is required to slide one layer of the liquid over the other layer is measured by

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friction

density

viscosity

resistivity

Which one of the following is dimensionless:

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Acceleration

Velocity

Density

Angle

The distance travelled byα-particle in a medium before coming to rest, is called

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range ofγ-particle

range of neutrons

range of particle

none of these

A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:

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22/7

7

14

21

Back emf is produced due to

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Self induction

Mutual induction

A.C

Lenz's law

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

The energy gap between conduction band and valence band is semiconductor is

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A very narrow forbidden energy gap

A narrow forbidden gap

Of the order of 1 eV

a and b

Selenium is an

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Insulator

Conductor

Semiconductor

Photo conductor

Polarization of material in an electric field is a

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Permanent phenomenon

Purely a temporarily phenomenon

Time dependent phenomemon

None of these

According to Bernoulli s theorem velocity and pressure

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Are directly proportional

Are inversely proportional

Have no relation

Are equal

The distance between different interference fringes are:

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Variable

Same

Different

None of these

A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shortest path in 15 minutes.The velocity of the river in km/s is:

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1

3

4

√41

Height at which value of 'g' becomes one-fourth to hat on earth is

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R

2R

(3/2)R

4R

In an adiabatic process

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Temperature remains constant

No change of internal energy

Volume remains constant

No heat enters or leaves the system

For the same value of resistors the output of non-inverting amplifier compared to the output of inverting amplifier is, (ignoring phase difference)

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Greater

Equal

Smaller

Undefined

Zirconia is classified as:

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Ceramic solid

Ionic compound

Metal

Either A or B

Either B or C

The idea of Michelsion's interferometer is based on the

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reflection of light

interference of light

refraction of light

all of them

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