Physics - Electricity Definitions

Question 0

Cell

Answer 0

Electron pump

Question 1

Electrons

Answer 1

Moving charged particles

Question 2

Battery

Answer 2

Collection of cells.

Flat batteries have high internal resistance

Question 3

Electric Current (I)

Answer 3

Amount of charge passing a point per unit time

Measured in Amperes(A)

Question 4

Charge (Q)

Answer 4

Amount of current passing a point per second

Measured in Coulombs(C)

Question 5

Cell

Answer 5

Source of potential energy and provides potential difference across a conductor

Question 6

Potential Differences

Answer 6

Work done per unit charge in moving a positive test charge from one point to another
1 V = 1J/C
Measured in Volts(V)

Question 7

Voltmeter

Answer 7

Measures Potential Difference. Have high resistance and are connected in parallel

Question 8

Resistance

Answer 8

Conductor’s opposition to flow of charge

Measured in Ohms(omega)

Question 9

emf

Answer 9

Total amount of electrical energy it supplies per unit charge passing through it.