P2: ELECTRICAL COMPONENTS

Question 1

What is the function of a cell/battery?

Answer 1

provides circuit with energy

Question 2

What is the function of an ammeter?

Answer 2

measures current

Question 3

What is the function of a voltmeter?

Answer 3

measures potential difference (voltage)

Question 4

What is the function of a resistor?

Answer 4

makes it difficult for current to flow

Question 5

What is the function of a variable resistor?

Answer 5

resistor where you can change resistance

Question 6

What is the function of a thermistor?

Answer 6

resistor where resistance depends on temperature (as temp increases resistance decreases)

Question 7

What is the function of an LDR?

Answer 7

resistor where resistance depends on light intensity (as light intensity increases resistance decreases)

Question 8

What is the funcion of a fuse?

Answer 8

safety feature - melts if too much current flows through the wire to break the circuit

Question 9

What is the function of a diode?

Answer 9

only allows current to flow in one direction

Question 10

What is the function of an LED?

Answer 10

a diode that emits light when the current is flowing in the desired direction