Electricity

Question 1

Insulators vs conductors free electrons

Answer 1

Insulators have few, conductors have many

Question 2

Conventional current

Answer 2

The flow of current from the positive terminal to negative terminal

This was proven incorrect so current actually flows negative to positive

Question 3

Charge equation

Answer 3

Charge (coulombs/C) = Current (Ampere/I) x Time

Question 4

Ohm’s law

Answer 4

The voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperature, remain constant

Question 5

Resistance formula

Answer 5

Voltage (Volts) = Current (Amperes) x Resistance (Ohms)

Question 6

Components connected in series

Answer 6

Current through each component is the same, the voltage of the supply is equal to the sum of the voltage across the separate components

Question 7

Components connected in parallel

Answer 7

Voltage across each component is the same as that of the supply, the total current from the supply is the sum of the currents going through each component

Question 8

Resistance formula

Answer 8

Parallel; 1/R = 1/R1 + 1/R2 + 1/R3

Series; RT = R1 + R2

Question 9

Energy formula

Answer 9

Energy (Joules/J) = Power (Watts/W) x Time

Question 10

Power formula

Answer 10

Power (Watts/W) = Current (Amps/A) x Voltage (Volts/V)

Question 11

Kilowatt hour

Answer 11

kWh = power (Watts/W) x Time (Hours)