Current Electricity
Physics ⇒ Electricity and Magnetism
Current Electricity starts at 8 and continues till grade 12.
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See sample questions for grade 8
A student connects a bulb, a battery, and a switch in a circuit. When the switch is closed, the bulb lights up. What happens if the switch is open?
A student uses a copper wire and an iron wire of the same length and thickness in a circuit. Which wire will have less resistance?
Describe the difference between series and parallel circuits.
Explain why metals are good conductors of electricity.
If the resistance in a circuit is doubled and the voltage remains the same, what happens to the current?
Name the law that relates voltage (V), current (I), and resistance (R) in a circuit.
A student connects a bulb, a battery, and a switch in a circuit. When the switch is closed, the bulb lights up. What happens if the switch is open?
A student uses a copper wire and an iron wire of the same length and thickness in a circuit. Which wire will have less resistance?
Which of the following is a non-conductor of electricity?
(1) Silver
(2) Plastic
(3) Aluminum
(4) Gold
Which of the following is a safety device used in household wiring?
(1) Resistor
(2) Fuse
(3) Capacitor
(4) Diode
Which of the following is a source of direct current (DC)?
(1) Battery
(2) Generator
(3) Transformer
(4) Capacitor
Which of the following is a unit of resistance?
(1) Ohm
(2) Volt
(3) Ampere
(4) Watt
Fill in the blank: The flow of electric current is possible only in a ________ circuit.
Fill in the blank: The potential difference between two points is measured in ________.
Fill in the blank: The rate of flow of electric charge is called ________.
Fill in the blank: The resistance of a conductor depends on its length, cross-sectional area, material, and ________.
True or False: Electric current can flow through insulators.
True or False: Electric current is the flow of electrons in a conductor.
True or False: In a parallel circuit, the voltage across each branch is the same.
True or False: The resistance of a wire increases as its length increases.
