Question # 1

The potential difference across each resistance in series combination is

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same

different

zero

none of these

Consider a spherical shell of metal at he centre of which a positive point charge is kept

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The electric filed is zero outside the shell

The electric field is zero everywhere

The electric field is zero in the region inside the shell

The electric field is non-zero in both regions outside and inside the shell

The charge carriers in gases are

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electrons

ions

protons

ions and electrons

10⁶electrons are moving through a wire per second, the current developed is

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1.6 x 10^-19

1 A

1.6 x 10^-15A

10⁶A

The current through a metallic conductor is due to the motion of

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protons

neutrons

electrons

free electrons

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

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They have the same potential

They have the same amount of charge

They have the same capacity

They have the same shape

The charge carriers in electrolyte are positive and negative

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protons

electrons

ions

none of these

In a charged capacitor the energy is stored in

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Both in positive and negative charges

Positive charges

The edges of the capacitor plates

The electric field between the plates

Capacitance of two or more capacitors

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Increases in series combination

Increases in parallel combination

Remains unchanged

None of the above

The unit of intensity of electric field is

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newton/coluomb

jule/coluomb

volt x metre

newton/metre

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 potential difference increase

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

Potential difference between the plates decreases and charge remains unchanged

None of the above

Ohm established a relation between

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voltage and resistance

voltage and charge

voltage and current

voltage resistance and charge

The thermistors are usually made of

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Metals with low temperature coefficient of resistivity

Metals with high temperature coefficient of resistivity

Metal oxides with high temperature coefficient of resistivity

Semi conducting materials having low temperature coefficient of resistivity

The SI unit of capacitance is

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Farad

Henry

Ohm

Volt

The relation V = IR represents

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Ampere law

Faraday's law

Ohm's law

Len's law

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