Question # 1

The phase angle of a series RLC circult at resonant frequency is

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1/2

sigma

Zero

sigma /4

Unit of self inductance is

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Weber

Tesla

Henry

Farad

Presence of dielectric always.

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Increase the electrostatic force

Reduces the electrostatic force

Do not effect electrostatic force

Doubles the electrostatic force

If the medium between the charges is not free space then electrostatic force will.be

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Increase

Decrease

Remain same

None of these

Two up quarks and one down quarks makes a

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Proton

Newton

Photon

Meson

Which one of the following resistance is used to convert a Galvanometer into an ammeter.

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High resistance

Low resistance in series with galvanometer

Shunt

High resistance in series with galvanometer

In pure capacitor A.C. circuit, the current I and charge q are.

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In phase

Out of phase

Parallel to each other

None of above

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, Then

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The charge in the plates reduces and potencial difference increase

Potencial difference between the plates increase, stored energy decreases and charge remains the same

Potencial difference between the plates decreases, stored energy decreases and charge remains unchanged

None of them

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

If a charge Q flows through any cross section of the conductor in time t, the current I is

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I=Qt

A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

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1884 ke V

1/1840 keV

1 keV

920 keV

SI unit of hennery which is.

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VSA-1

VS-1 A

VS-1A-1

VSA

If the north pole of a magnet moves away from a metallic ring

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Clockwise

Anticlockwise

First clockwise and then anticlockwise

None of above

In A.C circuit of inductor which one is true

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Voltage leads current by phase angle π/2

Voltage lags current by π/2

Current leads voltage by π/2

Both remain in phase

Example of ductile substance is.

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Glass

Wood

Lead

Oxygen

The sensitivity of galvanometer is given by

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CAN/B

C/BAN

BAN/C

BN/CA

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

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Flux density

Electric flux

Magnetic flux

Magnetic field strength

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