WorksheetsYear 8 MCQ
Total questions: 20
Worksheet time: 28mins
5A flows through a 240 V lamp. What is the resistance of the lamp?
30 ohms
80 ohms
48 ohms
What formula would be used to calculate the equivalent resistance if R1 and R2 were connected in series?
R = R1 × R2
R = 1/R1 + 1/R2
R = R1 + R2
What materials are the opposite of conductors?
Conductor
Insulator
Current
What is the unit of measurement used for current?
Amps
Ohms
Volts
If there are 7 Amps running through a 3 Ohm resistor, what will the voltage be across the resistor?
2.5 Volts
10 Volts
21Volts
What equation would you use to solve for voltage?
V = I/R
V = IR
V = PR
A device called an ammeter is used to measure ----------
Conductor
Voltage
Current
In a ------------- circuit, if one lamp is removed or broken the other stays on.
Parallel
Series
Straight
If there are 40 Volts and 5 Amps running through an electrical circuit, what is the resistance of the circuit?
8 Ohms
2 Ohms
4 Ohms
What do we call an electric charge that builds up on the surface of an object?
Resistive charge
Ampere charge
Static charge
What is the equivalent resistance of three 30 ohm resistors in series?
60 Ohms
90 Ohms
40 Ohms
What metal is the most commonly used conductor in electronic wiring and electronic circuits?
Silver
Copper
Lead
What is the equivalent resistance of two 10 ohm resistors in parallel?
5 Ohms
10 Ohms
20 Ohms
What happens when two items with positive charges come close to each other?
They attract each other
They repel each other
They will join together
What is static electricity?
Electricity that flows in one direction
Electricity that is sent over the air
An electrical charge on the surface of an object
What type of electronics can be easily damaged by a static electricity discharge?
Light bulbs
Electronic chips
Fans
Which of the following best describes resistors connected in series?
Resistors connected end-to-end
Resistors that connect to capacitors
Resistors that aren't in the same circuit
What small particles make up all matter?
Rocks
Minerals
Atoms
What atomic particles have a positive charge?
Neutrons
Electrons
Protons
What part of an electric circuit completes the circuit and starts the flow of electricity when it is closed?
Power Source
Switch
Load
