Question # 1

Pulsating output of full wave rectifier can be made smooth by using circuit called.

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Filter

Amplifier

Resistor

Transistor

Charge on an electron was determined by

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Ampere

Millikan

Maxwell

Bohr

Half life of radon gas is

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3.8 minutes

3.8 days

3.8 months

3.8 years

In the equation if f₂ > then

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Application of wave like nature of particle is

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Photodiode

Optical microscope

Electron microscope

Compound microscope

The sensitivity of galvanometer is given by

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CAN/B

C/BAN

BAN/C

BN/CA

Two up quarks and one down quarks makes a

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Proton

Newton

Photon

Meson

If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor.

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√2

1/√2

2

1/2

Electro magnetic waves emitted from radio antenna are.

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Stationary

Longitudinal

Transvers

Both a and b

The existence of positron was discovered in:

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1929

1928

1931

1933

Most of the electrons in the base of an NPN transistor flow:

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Out of the base lead

Into the collector

Into the emit

Into the base supply

SI unit of electric flux is.

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NmC¹

Nm^-1 C¹

Nm²C^-1

Nm³C²

substance which undergo plastic deformation until they break are known as.

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Brittle substances

Ductile substance

Non magnetic substance

Magnetic substance

The Compton effect is associated with

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X-rays

y-rays

Positive rays

ß-rays

Rectification is the process of converting.

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D.C. into A.C.

A.C. in to D.C.

Low signal to high

High signal to low

Eddy current is one cause energy loss in

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A.C. generator

Transformer

D.C. motor

D.C. generator

For accurate measurement of current through a circuit, the resistance of ammeter should be

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Very small

Very high

Neither small nor high

None of the above

if time constant in RC series circuit is small, then capacitor is charged or discharged.

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Slowly

Rapidly

At constant rate

Intermittently

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