Question # 1

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

The Weber is unit of measure of:

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Conductance

Electric current

Magnitic flux

Electric flux

If the length of solenoid is doubled but N same, B inside the solenoid becomes.

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Half

Doubled

One fourth

Four times

The emf induced by the motion of a conductor across a magnetic field is called:

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Motional emf

Rotational emf

Induced emf

All of above

A device which converts low voltage or current to high voltage or current is called.

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Transformer

AC generator

Amplifier

Rectifier

Charge on an atom is:

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Positive

Negative

Neutral

None of these

Reverse current flows due to

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Majority charge carriers

Minority charge carriers

Electrons

Holes

The mass of beta particle is equal to the mass

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Proton

Neutron

Electron

Photon

Energy density of an inductor is:

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UM=1/2μ_∘/B²

Um = 2μ_∘/B

UM = 1/2B²/μ_∘

Um = 2B²/μ_∘

When back emf in motor is zero, it draws.

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Zero current

Minimum current

Maximum current

Steady current

Galvanometer is sensitive when C/BAN is

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zero

Large

small

Negative

The longest wavelength of Paschen series is.

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656 nm

1094 nm

1875 nm

2000 nm

High frequency radio wave is called as

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Fluctuate

Carrier wave

Matter wave

Mechanical wave

Lenz's law presented in

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1834

1934

1826

1836

The reactance of inductor depends upon

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L

All of the above

The unit of Magnetic flux is called.

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weber

weber/m²

NM^-1A^-1

None of above

A battery is used in

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ohmmeter

Ammeter

Galvanometer

Voltemeter

Curie temperature is

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Differen for chromium oxide and cobalt

Same for chromium oxide and cobalt

Same for iron and cobalt

None of these

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