Chapter 9 - Energy, Power And Resistance Flashcards

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1
Q

Def - Potential Difference:

A

Potential Difference - The work done per unit charge
Potential Difference - The energy lost per unit charge

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2
Q

Def - Electromagnetic Force

A

Electromagnetic Force - The energy gained per unit charge

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3
Q

Def - Resistivity

A

Resistivity - Resistance of an area across its length

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4
Q

Def - Resistance

A

The opposition to the flow of current

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5
Q

State one difference and one similarity between e.m.f. and p.d.

A

Similarity - Same SI units
Difference - e.m.f. is voltage given out by a component and p.d. is voltage taken in by a component

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6
Q

Def - Ohm’s Law

A

For a metallic conductor at constant temperature, the current is directly proportional tto the p.d. across its ends

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