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 11
A battery supplies a current of 0.5 A for 10 minutes. How much charge flows through the circuit?
A circuit contains three resistors of 2 Ω, 3 Ω, and 5 Ω connected in series. What is the total resistance?
A circuit has two resistors, 10 Ω and 20 Ω, connected in parallel. What is the equivalent resistance?
A copper wire has a resistance of 2 Ω at 20°C. If the temperature coefficient of resistance is 0.004/°C, what will be its resistance at 30°C?
A current of 2 A flows through a resistor of 5 Ω. What is the potential difference across the resistor?
A student connects a 9 V battery to a lamp with a resistance of 3 Ω. What is the current through the lamp?
A wire of resistance 8 Ω is cut into two equal parts. What is the resistance of each part?
Define electric current in terms of charge and time.
Describe the effect of temperature on the resistance of a metallic conductor.
Explain the difference between direct current (DC) and alternating current (AC).
Explain why a fuse is always connected in series with the electrical device it protects.
If a 12 V battery is connected across a 6 Ω resistor, what is the power dissipated in the resistor?
If the resistance of a wire is doubled and the potential difference is kept constant, what happens to the current?
State Kirchhoff's Voltage Law (KVL).
State Ohm's Law.
The potential difference across a 4 Ω resistor is 12 V. Calculate the current through the resistor.
Which law states that the sum of currents entering a junction equals the sum of currents leaving the junction?
