Physics for IGCSE & O level - Electricity (Section 13)
1
Which of the following is listed under Electricity?
2
What is an advantage of using a parallel circuit compared to a series circuit?
Answer(C)
If one component fails, others still work.
3
Which of the following is a characteristic of a series circuit?
4
What happens to the brightness of a light bulb if the current flowing through it decreases?
Answer(B)
The brightness decreases.
5
What happens to current in a series circuit if one of the light bulbs is removed?
6
If the current in a circuit is 2 amps and the voltage is 12 volts, what is the resistance?
7
What is the name given to the flow of electrons through a conductor?
8
In a parallel circuit, what is the relationship between potential difference and the components?
Answer(B)
The voltage is the same across each.
9
What is the role of a diode in a circuit?
Answer(B)
To allow current flow in one direction only
10
What is the unit of electrical resistance?
11
What is the correct formula to calculate the power?
Answer(B)
Power = Voltage * Current
12
What is the main function of an RCD (Residual Current Device)?
Answer(B)
To detect and quickly cut off the power in the event of a current leakage.
13
If the current in a circuit is 3 Amps and the resistance is 2 Ohms, what is the voltage?
14
What are some common uses for LEDs?
15
What is a short circuit characterized by?
16
Answer(C)
A circuit with very low resistance
17
In the context of static electricity, what does the term 'discharge' mean?
Answer(B)
To remove charge from an object.
18
What type of device can be used to convert AC voltage to DC voltage?
19
What is the unit of measurement for electric current?
20
What happens when a charged rod touches a neutral object?
Answer(B)
The object becomes charged with the same sign as the rod.
21
What unit is used for measuring the amount of electrical energy?
22
Which of the following components acts like a variable resistor?
