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 24 V battery is connected to a resistor and a current of 4 A flows. What is the resistance of the resistor?
A 9 V battery is connected to a lamp with a resistance of 3 Ω. Calculate the current flowing through the lamp.
A circuit contains three resistors of 2 Ω, 3 Ω, and 5 Ω connected in series. What is the total resistance?
A circuit has a current of 0.5 A and a resistance of 8 Ω. What is the voltage across the circuit?
A parallel circuit has two resistors: 6 Ω and 3 Ω. What is the total resistance?
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?
A wire has a resistance of 10 Ω and a current of 2 A flows through it. What is the voltage across the wire?
Describe the difference between series and parallel circuits.
Explain why metals are good conductors of electricity.
If a circuit has a voltage of 12 V and a resistance of 4 Ω, what is the current flowing through it?
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.
What happens to the brightness of bulbs connected in series if more bulbs are added?
What is meant by the term 'electric circuit'?
What is the direction of conventional current in a circuit?
What is the function of a fuse in an electric circuit?
What is the SI unit of electric current?
Which instrument is used to measure potential difference?
Which law states that the current through a conductor between two points is directly proportional to the voltage across the two points?
