Grade 10 - Basic Principles of Electricity

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Varies depending on the element

Which of the following materials is a good conductor of electricity?

• Rubber

• Glass

• Copper

• Wood

What is the primary function of a resistor in a circuit?

• Store electrical energy

• Convert electrical energy into mechanical energy

• Limit the flow of electric current

• Increase voltage

Ohm's Law states that voltage is equal to:

• Current divided by resistance

• Current multiplied by resistance

• Resistance divided by current

• Current plus resistance

If the resistance in a circuit increases while voltage remains the same, what happens to the current?

• It increases

• It decreases

• It stays the same

• It doubles

Kirchhoff's Voltage Law states that the total voltage in a closed loop is equal to:

• The sum of the voltage drops across all components

• The total current in the circuit

• The resistance in the circuit

• The highest voltage in the loop

If a circuit has a 12V battery and two resistors (4Ω and 2Ω) in series, what is the total resistance?

• 2Ω

• 4Ω

• 6Ω

• 8Ω

Kirchhoff's Current Law applies to which part of a circuit?

• A closed loop

• A single resistor

• A junction where wires meet

• The power source

If 5A of current enters a junction and splits into two branches carrying 2A and 3A, what does Kirchhoff's Current Law state?

• The current entering the junction is greater than the current leaving

• The current entering is equal to the current leaving

• The current leaving is greater than the current entering

• Current is lost at the junction

A circuit with a 9V battery and a 3Ω resistor will have a current of:

• 27A

• 6A

• 3A

• 1A