Electrical circuits test questions - WJEC

1

What is this component?

Standard symbol for diode.

2

Which is the correct symbol for an a.c. power supply?

3

What is this a current-voltage graph for?

Graph plotting Current against Voltage. There is no current until a particular voltage is reached.

4

Which circuit is a parallel circuit?

5

Which circuit draws the smallest current from the cell, assuming both cells are identical?

Two circuit diagrams. Circuit A has one battery and one 2 Ohm resistor. Circuit B has one battery and two 2 Ohm resistors connected in series.

6

A 6 V battery is connected to a lamp. The current is 2 A. What is the resistance of the lamp?

7

What happens to the resistance of an thermistor as the temperature rises?

8

What happens to the resistance of an LDR (light dependent resistor) as the light level increases?

9

What is the total resistance of the three resistors connected in series?

Three resistors connected in series. They are labelled 5 Ohms, 10 Ohms and 10 Ohms.

10

What is the total resistance of the three resistors connected in parallel?

Three resistors connected in parallel. They are labelled 12 Ohms, 18 Ohms and 6 Ohms.