Question # 1

The current through a resistance of 100 Ohm when connecting across a source of 220 V is.

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22000 A

22 A

2.2 A

0.45 A

In order to measure potential difference voltmeter is always connected in.

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Series

Parallel

Both a and b

Neither in series nor in parallel

A° is the unit of:

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Energy

Length

Nuclear energy

Work

The mathematical symbol for NOR operation is

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X = A . B

X = A + D

The unit of Magnetic flux is called.

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weber

weber/m²

NM^-1A^-1

None of above

The quantity/factor h/m_oc has the dimensions of.

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Length

Time

Mass

Energy

Conductors have conductivities of order:

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10³(Ωm)-1

10⁷(Ωm)^-1

10⁷Ωm^-1

10^-6Ω

In purely resistive A.C circuit, instantaneous value of voltage and current:

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Current lags behind voltage

Current leads voltage by π/2

Both are in Phase

Voltage leads current by Pase θ=π/2

The existence of positron in 1928 was predicted by

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Anderson

Dirac

Chadwick

Plank

In modulation, low frequency signal is known as

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Carrier wave

fluctuated signal

Modulated carrier signal

Modulation signal

Coulomb's force is:

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Conservative force

None conservative force

Similar to frictional force

None of the above

The unit of magnetic induction B is

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Coulomb

Ampere

Coulomb/ampere

Weber/m²

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

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

Donor impurities are

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Germanium, silicon

Indium, galium

Antimony, arsenic

Diamond, carbon

When a wire is stretched and its radius becomes r/2, then its resistance will be

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16 R

4 R

2R

0

The electric field lines are closer where the field is

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Strong

Weak

Uniform

Variable

Which of the following basic force is able to provide an attraction between two neutrons:

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Electrostatic and nuclear b

Electrostatic and gravitational

Gravitational and strong nuclear

Only nuclear force

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