Year 9 Electricity Questions and Answers | Latest Update | 2024/2025 | Graded A+
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Course
Year 9 Electricity
Institution
Year 9 Electricity
Year 9 Electricity Questions and
Answers | Latest Update | 2024/2025 |
Graded A+
What is the basic unit of electric charge?
The basic unit of electric charge is the coulomb (C).
Define electric current.
Electric current is the flow of electric charge in a circuit, measured in ampere...
Year 9 Electricity Questions and
Answers | Latest Update | 2024/2025 |
Graded A+
What is the basic unit of electric charge?
✔✔ The basic unit of electric charge is the coulomb (C).
Define electric current.
✔✔ Electric current is the flow of electric charge in a circuit, measured in amperes (A).
What is the difference between alternating current (AC) and direct current (DC)?
✔✔ Alternating current (AC) changes direction periodically, while direct current (DC) flows in
one direction only.
What is Ohm’s Law?
✔✔ Ohm’s Law states that the current through a conductor between two points is directly
proportional to the voltage across the two points, represented by the formula \( V = IR \), where
\( V \) is voltage, \( I \) is current, and \( R \) is resistance.
1
, How is electrical power calculated?
✔✔ Electrical power is calculated using the formula \( P = VI \), where \( P \) is power in watts
(W), \( V \) is voltage in volts (V), and \( I \) is current in amperes (A).
What is the purpose of a resistor in an electrical circuit?
✔✔ A resistor is used to limit the flow of electric current in a circuit, providing resistance to the
current flow.
Explain what a series circuit is.
✔✔ A series circuit is a type of electrical circuit in which components are connected end-to-end,
so the same current flows through each component.
What is the function of a capacitor?
✔✔ A capacitor stores electrical energy in an electric field and releases it when needed, often
used for smoothing out voltage fluctuations in circuits.
What happens to the total resistance in a series circuit when more resistors are added?
✔✔ The total resistance in a series circuit increases when more resistors are added because the
total resistance is the sum of all individual resistances.
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