WorksheetsElectrical Quantities
Total questions: 20
Worksheet time: 10mins
What is the SI unit of electric charge?
Volt
Ampere
Coulomb
Ohm
Which particles are responsible for carrying charge in a metallic conductor?
Protons
Neutrons
Electrons
Ions
What happens to the current when the resistance of a circuit doubles, assuming voltage remains constant? (use ohm's law)
Doubles
Halves
Remains the same
Can't be predicted
The formula for current is:
( V x R )
( V / R )
( R / V )
( Q x T )
Which component is used to vary resistance in a circuit?
Thermistor
LDR
Variable resistor
Diode
A positively charged object will attract:
Negative charges
Positive charges
Neutral objects (remember: neutral objects have protons, neutrons, and electrons where number of protons=number of electrons)
Both A and C are correct
Which material is a good conductor of electricity?
Rubber
Copper
Glass
Wood
Ohm's Law is stated as:
( I = V / R )
( R = I / V )
( P = V x I )
( Q = I x t )
The resistance of a wire is directly proportional to its:
Area
Temperature
Length
Material density
The unit of resistance is:
Joule
Ohm
Volt
Coulomb
What is the main purpose of a fuse in a circuit?
To store charge
To protect the circuit from excessive current
To increase voltage
To maintain resistance
If a 6 V battery supplies a current of 3 A, what is the resistance?
2 Ω
18 Ω
0.5 Ω
9 Ω
Which statement is true about series circuits?
Voltage is the same across each component.
Total resistance is the sum of individual resistances.
Current varies across components.
Resistance is always constant.
What device measures electric current?
Voltmeter
Ammeter
Thermistor
Galvanometer
You are doing an experiment to measure the resistance of a wire. The two quantities you must measure to state the equipment you need to make measurements. What is the correct answer below.
Quantity: Voltage - Equipment: Voltmeter , and also Quantity: Current - Equipment: Voltmeter
Quantity: Voltage - Equipment: Voltmeter , and also Quantity: Current - Equipment: Ammeter
Quantity: Voltage - Equipment: Ammeter, and also Quantity: Current - Equipment: Voltmeter
Quantity: Voltage - Equipment: Ammeter, and also Quantity: Current - Equipment: Ammeter
The relationship between power, voltage, and current is:
( P = I x V )
( P = V / R )
( P = I2 / R )
( P = R x Q )
Electron flow from ….. Conventional current flow from ….
positive to negative ; positive to negative
Positive to negative ; negative to positive
Negative to positive; positive to negative
Negative to positive ; negative to positive
The potential difference across a toaster is 120 V. If a charge of 500 C flows through the toaster, what is the work done in Joules?
60
600
720
1,200
If a computer has 10.0A of current and 11Ω of resistance, what is its voltage?
0.9V
1.1V
55V
110V
