P2. Electricity

Identify the circuit symbol

• Resistor

• Fuse

• Thermistor

• Lamp

Identify the circuit symbol

• Diode

• Light Emitting Diode (LED)

• Light Dependent Resistor (LDR)

• Ammeter

Identify the circuit symbol

• Light Dependent resistor

• Variable Resistor

• Thermistor

• Resistor

Identify the circuit symbol

• Battery

• Power Pack

• Ammeter

• Lamp

Identify the circuit symbol

• Thermistor

• Light Dependent Resistor

• Variable Resistor

• Resistor

Two identical bulbs are wired in series with each other, shortly after turning the circuit on, one bulb blows. What happens to the other bulb?

• It gets brighter

• It gets dimmer

• It goes out

Three identical bulbs are wired in series with each other. The resistance of the whole circuit is 60Ω. What is the resistance of 1 bulb

• 10Ω

• 20Ω

• 60Ω

A student wants to experiment with this circuit and decides to put an ammeter in. Which of these is correct

• It does not matter where it goes so long as it is parallel

• It does not matter where it goes so long as it is in series

• It must go between two bulbs

• It must go between the power supply and the bulbs

Wired correctly the ammeter reads 0.25A. Assuming the three bulbs still have a combined resistance of 60Ω, calculate the potential difference across all 3 bulbs.

• 15V

• 60.25V

• 59.75

• 240V

The three lamps are rewired parallel to each other, compare the brightness of these lamps from when they were in series. The power supply has stayed the same.

• They are now brighter

• They are now dimmer

• It is impossible to say