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 10
Define electric potential difference.
Describe the difference between series and parallel circuits.
Explain why a fuse is used in an electric circuit.
Explain why metals are good conductors of electricity.
If the resistance of a wire is doubled and the potential difference remains the same, what happens to the current?
Context: A circuit contains a battery of 9 V and a resistor of 3 Ω. Calculate the current flowing through the resistor.
Context: A 24 V battery is connected to a circuit with a total resistance of 48 Ω. If the battery is replaced with a 12 V battery, what happens to the current in the circuit?
Context: A student connects three resistors of 2 Ω, 3 Ω, and 6 Ω in parallel to a 12 V battery. Calculate the total current supplied by the battery.
Which of the following is NOT a factor affecting the resistance of a conductor?
(1) Length
(2) Material
(3) Temperature
(4) Color
Which of the following is the correct formula for electric power?
(1) P = IV
(2) P = I/R
(3) P = V/I
(4) P = IR
Which of the following is the SI unit of electric current?
(1) Volt
(2) Ampere
(3) Ohm
(4) Coulomb
Which of the following materials is a good conductor of electricity?
(1) Rubber
(2) Glass
(3) Copper
(4) Wood
Fill in the blank: The device used to measure potential difference is called a __________.
Fill in the blank: The flow of electric charge is called __________.
Fill in the blank: The instrument used to measure electric current is called a(n) __________.
Fill in the blank: The rate of flow of charge is measured in __________.
True or False: In a parallel circuit, the total current is the sum of the currents through each branch.
True or False: The direction of conventional current is opposite to the flow of electrons.
True or False: The resistance of a conductor decreases with increase in temperature for most metals.
True or False: The resistance of a wire increases as its length increases.
