IGCSE Physics Electrical

What is the total resistance of three resistors, 2 Ω, 4 Ω, and 6 Ω, connected in series?

• 2 Ω

• 12 Ω

• 6 Ω

• 1/12 Ω

If a 60 W light bulb is connected to a 120 V supply, what is the current flowing through the bulb?

• 0.25 A

• 0.5 A

• 1 A

• 2 A

Which of the following statements is true about a parallel circuit?

• The total resistance is the sum of the individual resistances

• The total resistance is always greater than the largest resistance

• The current is the same in all branches

• The voltage is the same across all branches

What is the unit of electrical resistance?

• Volt

• Ohm

• Ampere

• Watt

A 10 Ω resistor and a 20 Ω resistor are connected in parallel. What is the combined resistance?

• 15 Ω

• 30 Ω

• 6.67 Ω

• 2 Ω

What happens to the current in a wire if the potential difference is doubled, assuming the resistance stays the same?

• It doubles

• It halves

• It stays the same

• It quadruples

An electron moves through a potential difference of 12 V. What is the energy gained by the electron?

• 12 J

• 1.92 x 10^-19 J

• 19.2 x 10^-19 J

• 1.6 x 10^-19 J

What is the power dissipated by a 5 Ω resistor carrying a current of 2 A?

• 10 W

• 20 W

• 25 W

• 50 W

A circuit has a total current of 3 A and a total resistance of 4 Ω. What is the voltage supplied by the source?

• 3 V

• 12 V

• 1.33 V

• 7 V

A current of 5 A flows through a wire for 10 seconds. How much charge has passed through the wire?

• 0.5 C

• 2 C

• 50 C

• 10 C