6 Electric Circuits

Question 1

Current (series circuit)

Answer 1

Same at every point in the circuit

Question 2

Calculation for combined resistance (series circuit)

Answer 2

Add them together

Question 3

Potential difference across components (series circuit)

Answer 3

Same as the potential difference across the supply

Question 4

Current (parallel circuit)

Answer 4

Larger in the source than in each branch
In the source is equal to sum in the branches

Question 5

Combined resistance of resistors connected in parallel is …

Answer 5

less than that of either resistor by itself

Question 6

Calculation for combined resistance (parallel circuit)

Answer 6

1/Rₜ = 1/R₁ + 1/R₂

Question 7

Advantage of connecting lamps in parallel in a circuit

Answer 7

If one stops working, the rest will still be able to turn off

Question 8

Thermistor effect on resistance with temperature

Answer 8

Temperature ^
Resistance !

Question 9

Light Dependent Resistor (LDR) effect on resistance with light

Answer 9

Light ^
Resistance !

Question 10

Equations for power and combined equation

Answer 10

P = IV
P = E/t
E = IVt

Question 11

Electrical hazards (3)

Answer 11

damaged insulation
overheating of cables
damp conditions

Question 12

A ____ protects a circuit

Answer 12

fuse