Ohm’s Law
Physics ⇒ Electricity and Magnetism
Ohm’s Law starts at 8 and continues till grade 12.
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See sample questions for grade 11
A 100 Ω resistor is connected in a circuit. If the current is 0.05 A, what is the voltage across the resistor?
A circuit contains a 20 Ω resistor and a 10 V battery. What is the current in the circuit?
A resistor has a resistance of 10 Ω and a current of 2 A flows through it. What is the voltage across the resistor?
A resistor has a resistance of 50 Ω. If the current through it is 0.2 A, what is the voltage across it?
A resistor is connected to a 9 V battery and the current measured is 0.3 A. Calculate the resistance.
A student connects a 12 V battery to a resistor and measures a current of 0.5 A. What is the resistance of the resistor?
A student increases the voltage across a resistor from 2 V to 6 V. If the resistance is 2 Ω, by how much does the current increase?
A wire has a resistance of 5 Ω. If a voltage of 15 V is applied, calculate the current flowing through the wire.
Describe the relationship between current and voltage for an ohmic conductor.
Describe what is meant by an ohmic conductor.
Explain why Ohm’s Law is not applicable to a filament lamp at high voltages.
Explain why Ohm’s Law is not valid for a diode.
State Ohm’s Law.
Explain why Ohm’s Law is not valid for a superconductor below its critical temperature.
