Question 26
[Maximum number: 1]
Which circuit symbol represents a component used to measure electric current?
IGCSE Physics 4.3.1 Circuit diagrams and circuit components Question Bank
4.3.1 Circuit diagrams and circuit components
Question 28
[Maximum number: 1]
A student designs a circuit to turn on a fan when the temperature increases.
Which component does the student need to use in her circuit?
A
B
C
D
Question 28
[Maximum number: 1]
The four circuits shown all include an a.c. power supply, two diodes and a lamp.
In which circuit is there a rectified current in the lamp?
Question 29
[Maximum number: 1]
In which circuit do both lamps light?
A
B
c
D
Question 29
[Maximum number: 1]
The circuit diagram shows a cell connected in series to a resistor and a component X.
What is component X ?
A
bell
B
diode
C
heater
D
thermistor
Question 29
[Maximum number: 1]
The circuit diagram shows a circuit used to run a d.c. motor from an a.c. supply.
Which graph shows the current in the motor?
Question 29
[Maximum number: 1]
An alternating (a.c.) supply is connected to a diode and a resistor in series.
a.c. supply
a.c. supply
Which graph shows how the potential difference V across the resistor varies with time t ?
Question 29
[Maximum number: 1]
The diagram shows a circuit that switches on a lamp when there is a change in the environment.
Which change in the environment causes the lamp to be switched on?
A
a decrease in light intensity
B
a decrease in temperature
C
an increase in light intensity
D
an increase in temperature
Question 29
[Maximum number: 1]
The four circuits shown all include an a.c. power supply, two diodes and a lamp. In which circuit is there a rectified current in the lamp?
Question 29
[Maximum number: 1]
A student connects the circuit shown.
Which switches must be closed for the bell to ring without lighting the lamp?
A
1 and 2 only
B
1 and 3 only
C
1, 3 and 4
D
2, 3 and 4