P4

Question 1

Open switch

Answer 1

Breaks a circuit stopping charge flowing

Question 2

Closed switch

Answer 2

Completes a circuit allowing charge to flow

Question 3

Battery

Answer 3

Two or more cells

Question 4

Cell

Answer 4

Pushes the electrons around the circuit

Question 5

Diode

Answer 5

Allows current to flow in One Direction only

Question 6

Resistor

Answer 6

Limits the current in the circuit

Question 7

Variable resistor

Answer 7

Allows current to be varied

Question 8

Lamp

Answer 8

Emits light when a current passes through

Question 9

Fuse

Answer 9

Melts and breaks in the circuit if the current passing through is greater than a certain amount

Question 10

Volt meter

Answer 10

Measures the potential difference ( voltage )

Question 11

Ammeter

Answer 11

Measures the current (amps)

Question 12

Thermistor

Answer 12

Allows the current to be vary depending on its temperature

Question 13

LED light emitting diode

Answer 13

Emits light when electrical current is passed through it can be different coloured lights

Question 14

LDR light dependent resistor

Answer 14

Resistance depends on light intensity

Question 15

Bulb characteristic

Answer 15

As temperature changes the resistance changes