Current Electricity

Physics ⇒ Electricity and Magnetism

Current Electricity 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 Current Electricity. 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 9

A 60 W bulb is connected to a 120 V supply. What is the current through the bulb?

A battery provides a potential difference of 9 V and a current of 0.3 A flows through a circuit. What is the resistance?

A circuit contains two resistors, 4 Ω and 6 Ω, connected in parallel. What is the total resistance?

A circuit contains two resistors, 4 Ω and 6 Ω, connected in series. What is the total resistance?

A resistor has a resistance of 5 Ω and a current of 3 A flows through it. What is the voltage across the resistor?

A student connects a 6 V battery to a 2 Ω resistor. What is the current in the circuit?

A wire carries a current of 5 A for 2 minutes. How much charge flows through the wire?

Define electric power.

Describe the difference between a series and a parallel circuit.

Describe the function of a switch in an electric circuit.

Explain why a fuse is used in an electric circuit.

Explain why metals are good conductors of electricity.

If a 12 V battery is connected to a circuit with a total resistance of 24 Ω, what is the current in the circuit?

If a current of 2 A flows through a wire for 10 seconds, how much charge passes through the wire?

If three resistors of 2 Ω, 3 Ω, and 6 Ω are connected in parallel, what is the total resistance?

If three resistors of 2 Ω, 3 Ω, and 6 Ω are connected in series, what is the total resistance?

State Ohm's Law.

State the effect of increasing the cross-sectional area of a wire on its resistance.

State the relationship between resistance and the length of a conductor.

What is the effect on the current if the resistance in a circuit is doubled, keeping the voltage constant?