subject

Ohm’s Law

Physics ⇒ Electricity and Magnetism

Ohm’s Law starts at 8 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Ohm’s Law. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 8
A 24 V battery is connected to a resistor and a current of 6 A flows. What is the resistance?
A circuit has a resistance of 15 Ω and a voltage of 45 V. What is the current?
A circuit has a voltage of 12 V and a resistance of 4 Ω. Calculate the current flowing through the circuit.
A resistor has a resistance of 8 Ω and a current of 0.5 A flows through it. What is the voltage across the resistor?
A student connects a 9 V battery to a resistor and measures a current of 0.3 A. What is the resistance of the resistor?
A student measures a current of 0.4 A through a resistor when a voltage of 2 V is applied. What is the resistance?
A student uses a 10 Ω resistor in a circuit with a 5 V battery. What is the current in the circuit?
A wire has a resistance of 5 Ω. If the voltage across it is 15 V, what is the current flowing through the wire?
If a bulb is rated at 6 V and 0.5 A, what is its resistance?
If a circuit has a resistance of 20 Ω and a current of 0.2 A, what is the voltage across the circuit?
If a resistor has a resistance of 10 ohms and a current of 2 amperes flows through it, what is the voltage across the resistor?
If a resistor has a resistance of 25 Ω and a current of 0.2 A flows through it, what is the voltage across the resistor?
If a resistor has a resistance of 50 Ω and the voltage across it is 100 V, what is the current?
If the current through a resistor is 0.25 A and the resistance is 40 Ω, what is the voltage across the resistor?
If the resistance in a circuit is halved and the voltage remains the same, what happens to the current?
If the voltage across a resistor is doubled, what happens to the current (assuming resistance is constant)?
What is Ohm’s Law?
A 6 V battery is connected to a resistor, and a current of 0.5 A flows. If the resistance is increased to 24 Ω, what will be the new current?
A student builds a circuit with a 12 V battery and two resistors, R₁ = 4 Ω and R₂ = 8 Ω, connected in series. What is the total current flowing through the circuit?
A student claims that doubling the length of a wire will double its resistance, assuming all other factors remain constant. Is this statement true or false? Explain your answer.