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 10
A 24 V battery is connected to a resistor and a current of 3 A flows. What is the resistance of the resistor?
A circuit has a current of 4 A and a resistance of 2 Ω. What is the voltage across the circuit?
A circuit has a resistance of 5 Ω and a voltage of 10 V. Calculate the current flowing through 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 20 Ω. If a voltage of 100 V is applied, what is the current?
A student connects a 6 V battery to a resistor and measures a current of 0.5 A. What is the resistance of the resistor?
A student measures a current of 0.5 A through a resistor when a voltage of 5 V is applied. What is the resistance?
A wire has a resistance of 12 Ω. If the current through it is 0.25 A, what is the voltage across the wire?
Describe a practical application of Ohm’s Law in everyday life.
Describe what is meant by an ‘ohmic’ conductor.
Explain why a filament lamp does not obey Ohm’s Law at high voltages.
Explain why semiconductors do not obey Ohm’s Law.
If a wire obeys Ohm’s Law, what type of graph will you get when you plot current (I) against voltage (V)?
If the resistance in a circuit is 15 Ω and the voltage is 45 V, what is the current?
What is Ohm’s Law?
