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Science, Gr. 9Characteristics of Electricity – Measuring Electricity

Potential Difference Calculations Worksheet

1. Find the unknown quantity:

a) V = ? E = 45 J Q = 15 C

b) V = 9 V E = ? Q = 150 C

c) V = 1.5 V E = 225 J Q = ?

2. Find the unknown quantity (CONVERT FIRST to volts, joules, or coulombs)

a) V = 1000 mV = ______ V E = ? Q = 20 C

b) V = ? E = 1.25 kJ = _________ J Q = 1500 C

c) V = 1.21 GV =_________V E = ? Q = 2 000 000 C

WORD PROBLEMS

1. The potential difference between the two terminals on a battery is 9 volts. How much work (energy) is required to transfer 10 coulombs of charge across the terminals?

2. Ten joules of work (energy) are required to transfer 2 coulombs of charge from X to Y. What is the difference in potential between these two points?

3. It requires 600 joules of energy to transfer a quantity of charge between points C and D of a circuit, which have a potential difference of 30 volts. How much charge is transferred?

potential difference = energy charge

V = E Units: V is V (volts) Q Q is C (coulombs)

E is J (joules)

EV Q