Current of Electricity Flashcards

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1
Q

Define Electric Current.

A

It is defined as the rate of flow of charged particles.

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2
Q

What is a Drift Velocity?

A

It is the rate of change of displacement along the conductor with respect to time.

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3
Q

What is the conservation of charge?

A

It suggests that charges cannot be destroyed nor created, which implied that current remains constant along one single conductor.

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4
Q

Define Potential Difference.

A

The P.D. across a device is the electrical energy converted to other forms of energy per unit charge passing through the device.

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5
Q

What is an electromotive force?

A

The E.M.F. of a source is the electrical energy, converted from other forms of energy per unit charge, transferred by the source in driving unit charge round a complete circuit.

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6
Q

Define resistance.

A

The resistance of a conductor can be defined as the ratio of the potential difference across the conductor to the current flowing through it.

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7
Q

Explain Ohm’s Law.

A

Ohm’s Law states that the current through a metallic conductor is proportional to the potential difference across its ends under constant physical conditions.

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