Current Electricity

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Q1. A circuit has a 24V battery and a total resistance of 12Ω. What is the current flowing through the circuit? (2020)

Solution:

Using Ohm's law, I = V/R = 24V / 12Ω = 2A.

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Q2. In a circuit with a 9V battery and a 3Ω resistor, what is the power dissipated in the resistor? (2023)

Solution:

Power P = V²/R = (9V)² / 3Ω = 81 / 3 = 27W.

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Q3. What is the current through a 12Ω resistor connected to a 24V battery? (2023)

Solution:

Using Ohm's law, I = V/R = 24V / 12Ω = 2A.

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Q4. If a circuit has a total resistance of 12Ω and a current of 1.5A, what is the voltage across the circuit? (2021)

Solution:

Using Ohm's law, V = IR = 1.5A * 12Ω = 18V.

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Q5. If a 15Ω resistor is connected in parallel with a 5Ω resistor, what is the equivalent resistance? (2023)

Solution:

1/R_eq = 1/15 + 1/5 = 1/15 + 3/15 = 4/15; R_eq = 15/4 = 3.75Ω.

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Q6. What is the total current flowing through a circuit with a 9V battery and a total resistance of 3Ω? (2022)

Solution:

Using Ohm's law, I = V/R = 9V / 3Ω = 3A.

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Q7. A circuit has a total resistance of 8Ω and a current of 4A flowing through it. What is the voltage across the circuit? (2021)

Solution:

Using Ohm's law, V = I * R = 4A * 8Ω = 32V.

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Q8. What is the potential difference across a 5Ω resistor carrying a current of 2A? (2023)

Solution:

Using Ohm's law, V = IR = 2A * 5Ω = 10V.

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Q9. If a circuit has a total resistance of 5Ω and a current of 2A, what is the voltage across the circuit? (2022)

Solution:

Using Ohm's law, V = I * R = 2A * 5Ω = 10V.

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Q10. In a circuit with a 9V battery and a 3Ω resistor, what is the power dissipated by the resistor? (2021)

Solution:

Power is given by P = V²/R = (9V)² / 3Ω = 81V² / 3Ω = 27W.