electricity-igcse

A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is

• 2 × 10 ⁵ Joule

• 2 × 10 ³ Joule

• 2 x 10 ⁴ Joule

• 2 x 10² Joule

Thicker wires have _______ resistance than thinner wires.

• more
• less
• the same

According to Ohm's Law, the potential difference across the ends of a resistor is directly proportional to the ……… through it, provided its ............ remains constant.

• current, temperature

• temperature, current

• physical condition, temperature

• physical condition, current

Three resistors of 1 Ω, 2 Ω and 3 Ω are connected in parallel. The combined resistance of the three resistors should be

• greater than 3 Ω

• less than 1 Ω

• equal to 2 Ω

• between 1 Ω and 3 Ω

An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?

• 0.0023 W

• 55 W

• 110 W

• 440 W

What is the total resistance of the circuit?

If the battery voltage is 6V, what is the current through 20 Ohm and 10 ohm?

When the balloon is rubbed with hair, balloon becomes...........charged and hair becomes........charged because .......transferred from............ to ...........

• A

• B

• C

• D