WJEC Year 10 Physics Revision

State the rule for current in a series circuit.

• The current is the same at every point in a series circuit.

• The current is different at every point in a series circuit.

• The current is zero at every point in a series circuit.

• The current is maximum at every point in a series circuit.

State the rule for voltage (potential difference) in a series circuit.

• The voltage is the same across each component.

• The voltage is different across each component.

• The voltage is zero across each component.

• The voltage is maximum across each component.

What happens to the resistance of a circuit as resistors are added in series?

• The resistors add together in series to increase the total resistance.

• The resistors add together in series to decrease the total resistance.

• The resistors add together in series to keep the total resistance the same.

• The resistors add together in series to make the total resistance zero.

What is the equation for calculating resistance in a series circuit?

• R_t = R_1 + R_2

• R_t = \frac{1}{R_1} + \frac{1}{R_2}

• R_t = R_1 \times R_2

• R_t = \frac{R_1}{R_2}

3Ω and 10Ω resistors are connected together in series. The total resistance is...?

• 13Ω

• 7Ω

• 30Ω

• 3.3Ω

56Ω, 33Ω and 11Ω resistors are connected together in series. The total resistance is...?

• 100Ω

• 50Ω

• 200Ω

• 10Ω

State the rule for current in a parallel circuit.

• The total current through the whole circuit is the sum of the currents through each component.

• The total current through the whole circuit is the same as the current through each component.

• The total current through the whole circuit is zero.

• The total current through the whole circuit is maximum.

State the rule for voltage (potential difference) in a parallel circuit.

• The voltage is the same across each component.

• The voltage is different across each component.

• The voltage is zero across each component.

• The voltage is maximum across each component.

What happens to the resistance of a circuit as resistors are added in parallel?

• Adding more resistors in parallel decreases the total resistance.

• Adding more resistors in parallel increases the total resistance.

• Adding more resistors in parallel keeps the total resistance the same.

• Adding more resistors in parallel makes the total resistance zero.

What is the equation for calculating the total resistance in a parallel circuit?

• \frac{1}{R_t} = \frac{1}{R_1} + \frac{1}{R_2}

• R_t = R_1 + R_2

• R_t = R_1 \times R_2

• R_t = \frac{R_1}{R_2}