Question # 1

Terminal potential difference is greater than emf of the cell when

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Circuit is open

Circuit is closed

small battery is charged by bigger battery

None of these

The Lenz's law is also statement of:

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Law of conservation of mass

Law of conservation of charge

Law of conservation of energy

Law of conservation of momentum

Write the SI unit of magnetic flux.

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Tesla

Weber

Weber m-2

Tesla m2

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n

Which material should be inserted between the plates of a capacitor in order to increase its capacitance.

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Copper

Mica

Iron

Tin

Efficiency of transformer does not affected by

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Input voltage

Core of transformer

Insulation between sheet

Resistance of coils

The unit of radioactivity is:

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Bequerel

Henry

Pascal

Joule

1 amu is equal to

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1.0606 x 10^-27 kg

1.66 x 10^-31 kg

1.66 x 10^-34 kg

1.66 x 10^-19 kg

The radius of hydrogen atom is:

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0.53A°

0.053A°

0.53 x 10^-9

0.053 x10^-9

Recently superconductor discovered is at temperature.

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110K

143K

16.3K

119K

The critical temperature of Aluminum is.

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3.72 K

1.18 K

7.2 K

8.2 K

Force per unit charge is called:

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Gravitational force

Electric field intensity

Coulomb's force

None of these

A moving charge is surrounded by:

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2 Fields

3 Fields

4 Fields

None of these

The use of LDR is in the circuit of.

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Logic gate

Rectifier

Oscillator

High Switch

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

The most suitable metal for making permanent magnet is.

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Iron

Aluminium

Steel

Copper

Conversation of only one half of A.C. into D.C. is called.

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Half wave amplification

Wave amplification

Half wave electrification

Half wave rectification

When a nucleus emits alpha particle its atomic mass decreases by

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1

2

3

4

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