Q. A 10-ohm resistor is connected to a 20-volt battery. What is the power consumed by the resistor? (2021)
A.
20 W
B.
40 W
C.
10 W
D.
2 W
Show solution
Solution
Power (P) can be calculated using the formula P = V^2 / R. Here, P = 20^2 / 10 = 400 / 10 = 40 W.
Correct Answer:
B
— 40 W
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Q. A circuit has a current of 2A and a resistance of 6Ω. What is the voltage across the circuit? (2020)
A.
6V
B.
12V
C.
8V
D.
10V
Show solution
Solution
Using Ohm's Law, V = I * R = 2A * 6Ω = 12V.
Correct Answer:
B
— 12V
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Q. A circuit has a current of 3A and a resistance of 6Ω. What is the voltage across the circuit? (2019)
Show solution
Solution
Using Ohm's Law, V = I * R = 3A * 6Ω = 18V.
Correct Answer:
A
— 9V
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Q. A circuit has a current of 5A and a resistance of 10Ω. What is the power consumed in the circuit? (2020)
A.
25W
B.
50W
C.
75W
D.
100W
Show solution
Solution
Power (P) can be calculated using P = I^2 * R = (5A)^2 * 10Ω = 25 * 10 = 250W.
Correct Answer:
B
— 50W
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Q. A circuit has a current of 5A and a resistance of 2Ω. What is the power consumed in the circuit? (2020)
A.
10W
B.
25W
C.
50W
D.
100W
Show solution
Solution
Power (P) can be calculated using the formula P = I^2 * R = (5A)^2 * 2Ω = 25W.
Correct Answer:
B
— 25W
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Q. A circuit has a current of 5A and a resistance of 2Ω. What is the voltage across the circuit? (2020)
A.
10V
B.
5V
C.
2.5V
D.
15V
Show solution
Solution
Using Ohm's Law, V = I * R = 5A * 2Ω = 10V.
Correct Answer:
A
— 10V
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Q. If a 10Ω resistor carries a current of 2A, what is the voltage across the resistor? (2023)
A.
5V
B.
10V
C.
20V
D.
30V
Show solution
Solution
Using Ohm's Law, V = I * R = 2A * 10Ω = 20V.
Correct Answer:
C
— 20V
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Q. If a 10Ω resistor carries a current of 5A, what is the voltage across the resistor? (2023)
A.
10V
B.
20V
C.
30V
D.
50V
Show solution
Solution
Using Ohm's Law, V = I * R = 5A * 10Ω = 50V.
Correct Answer:
B
— 20V
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Q. If a 10Ω resistor is connected across a 20V battery, what is the power dissipated in the resistor? (2023)
A.
20W
B.
40W
C.
10W
D.
5W
Show solution
Solution
Power (P) can be calculated using the formula P = V^2 / R. Here, P = 20^2 / 10 = 400 / 10 = 40W.
Correct Answer:
B
— 40W
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Q. If a 10Ω resistor is connected to a 20V battery, what is the power consumed by the resistor? (2023)
A.
20W
B.
40W
C.
10W
D.
5W
Show solution
Solution
Power (P) can be calculated using the formula P = V^2 / R. Here, P = 20V^2 / 10Ω = 40W.
Correct Answer:
B
— 40W
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Q. If a 5Ω resistor is connected to a 15V battery, what is the power dissipated by the resistor? (2023)
A.
15W
B.
20W
C.
25W
D.
30W
Show solution
Solution
Power (P) can be calculated using P = V^2 / R. Here, P = 15V^2 / 5Ω = 45W.
Correct Answer:
C
— 25W
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Q. If a circuit has a current of 5 A and a resistance of 10 ohms, what is the voltage across the circuit? (2019)
A.
15 V
B.
50 V
C.
5 V
D.
10 V
Show solution
Solution
Using Ohm's Law, V = I * R = 5 A * 10 Ω = 50 V.
Correct Answer:
B
— 50 V
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Q. If a circuit has a current of 5A and a resistance of 10Ω, what is the voltage across the resistor? (2022)
A.
10V
B.
20V
C.
30V
D.
50V
Show solution
Solution
Using Ohm's Law, V = I * R = 5A * 10Ω = 50V.
Correct Answer:
B
— 20V
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Q. If a circuit has a resistance of 12Ω and a current of 3A, what is the power consumed in the circuit? (2022)
A.
36W
B.
24W
C.
12W
D.
9W
Show solution
Solution
Power (P) can be calculated using the formula P = I^2 * R = (3A)^2 * 12Ω = 36W.
Correct Answer:
A
— 36W
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Q. If a circuit has a total voltage of 24V and a total resistance of 6Ω, what is the total current in the circuit? (2022)
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Solution
Using Ohm's Law, I = V/R = 24V / 6Ω = 4A.
Correct Answer:
B
— 4A
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Q. If a circuit has a voltage of 24V and a current of 3A, what is the resistance? (2022)
Show solution
Solution
Using Ohm's Law, R = V / I = 24V / 3A = 8Ω.
Correct Answer:
B
— 6Ω
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Q. If a circuit has a voltage of 24V and a current of 6A, what is the resistance? (2022)
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Solution
Using Ohm's Law, R = V/I = 24V / 6A = 4Ω.
Correct Answer:
D
— 8Ω
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Q. If a resistor has a current of 2A flowing through it and a voltage of 10V across it, what is the resistance? (2023)
A.
2Ω
B.
5Ω
C.
10Ω
D.
20Ω
Show solution
Solution
Using Ohm's Law, R = V / I = 10V / 2A = 5Ω.
Correct Answer:
B
— 5Ω
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Q. If a resistor has a resistance of 10Ω and a current of 2A flows through it, what is the voltage across the resistor? (2023)
A.
5V
B.
10V
C.
20V
D.
30V
Show solution
Solution
Using Ohm's Law, V = I * R = 2A * 10Ω = 20V.
Correct Answer:
C
— 20V
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Q. If a resistor has a resistance of 10Ω and a current of 5A flows through it, what is the voltage across the resistor? (2023)
A.
10V
B.
20V
C.
30V
D.
50V
Show solution
Solution
Using Ohm's Law, V = I * R = 5A * 10Ω = 50V.
Correct Answer:
B
— 20V
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Q. If a resistor has a resistance of 8Ω and the current flowing through it is 4A, what is the power dissipated by the resistor? (2022)
A.
16W
B.
32W
C.
64W
D.
8W
Show solution
Solution
Power (P) can be calculated using P = I^2 * R = (4A)^2 * 8Ω = 16 * 8 = 128W.
Correct Answer:
B
— 32W
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Q. If a resistor has a resistance of 8Ω and the current flowing through it is 4A, what is the voltage across the resistor? (2022)
A.
32V
B.
16V
C.
8V
D.
4V
Show solution
Solution
Using Ohm's Law, V = I * R = 4A * 8Ω = 32V.
Correct Answer:
B
— 16V
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Q. If the current flowing through a conductor is 3A and the resistance is 2Ω, what is the voltage across the conductor? (2023)
A.
1.5V
B.
3V
C.
6V
D.
9V
Show solution
Solution
Using Ohm's Law, V = I * R = 3A * 2Ω = 6V.
Correct Answer:
C
— 6V
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Q. If the current flowing through a conductor is 3A and the resistance is 6Ω, what is the voltage across the conductor? (2023)
Show solution
Solution
Using Ohm's Law, V = I * R = 3A * 6Ω = 18V.
Correct Answer:
A
— 9V
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Q. If the current flowing through a resistor is 2A and the voltage across it is 6V, what is the resistance? (2022)
Show solution
Solution
Using Ohm's Law, R = V / I = 6V / 2A = 3Ω.
Correct Answer:
A
— 3Ω
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Q. If the current flowing through a resistor is 3A and the voltage across it is 9V, what is the resistance? (2022)
Show solution
Solution
Using Ohm's Law, R = V / I = 9V / 3A = 3Ω.
Correct Answer:
C
— 3Ω
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Q. If the current through a resistor is 2A and the resistance is 5Ω, what is the voltage across the resistor? (2022)
Show solution
Solution
Using Ohm's Law, V = I * R = 2A * 5Ω = 10V.
Correct Answer:
A
— 10V
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Q. If the current through a resistor is 5A and the resistance is 10Ω, what is the voltage across the resistor? (2022)
A.
50V
B.
5V
C.
10V
D.
15V
Show solution
Solution
Using Ohm's Law, V = I * R = 5A * 10Ω = 50V.
Correct Answer:
A
— 50V
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Q. If the resistance of a conductor is doubled while the voltage remains constant, what happens to the current? (2020)
A.
It doubles
B.
It halves
C.
It remains the same
D.
It quadruples
Show solution
Solution
According to Ohm's Law, if the resistance (R) is doubled and the voltage (V) remains constant, the current (I) will be halved (I = V/R).
Correct Answer:
B
— It halves
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Q. In a circuit with a 24V battery and a 6Ω resistor, what is the power consumed by the resistor? (2020)
A.
48W
B.
72W
C.
96W
D.
144W
Show solution
Solution
Power (P) can be calculated using P = V^2 / R. Here, P = 24V^2 / 6Ω = 96W.
Correct Answer:
B
— 72W
Learn More →
Showing 1 to 30 of 42 (2 Pages)
Current Electricity - Ohms Law MCQ & Objective Questions
Understanding "Current Electricity - Ohms Law" is crucial for students preparing for school and competitive exams in India. This topic not only forms the foundation of electrical concepts but also frequently appears in various examination formats. Practicing MCQs and objective questions on this subject can significantly enhance your exam preparation and boost your scores.
What You Will Practise Here
Fundamental concepts of current, voltage, and resistance
Ohm's Law and its mathematical representation
Applications of Ohm's Law in real-world scenarios
Understanding series and parallel circuits
Key formulas related to electrical circuits
Graphical representation of Ohm's Law
Common units and measurements in electricity
Exam Relevance
The topic of "Current Electricity - Ohms Law" is highly relevant in CBSE, State Boards, NEET, and JEE examinations. Students can expect questions that test their understanding of Ohm's Law, its applications, and problem-solving skills in circuit analysis. Common question patterns include numerical problems, conceptual questions, and application-based scenarios, making it essential to master this topic for effective exam performance.
Common Mistakes Students Make
Confusing the relationship between voltage, current, and resistance
Misapplying Ohm's Law in complex circuits
Overlooking the significance of units in calculations
Failing to differentiate between series and parallel circuits
FAQs
Question: What is Ohm's Law?Answer: Ohm's Law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance.
Question: How can I apply Ohm's Law in circuit problems?Answer: You can apply Ohm's Law by using the formula V = IR, where V is voltage, I is current, and R is resistance, to solve for any unknown variable in circuit problems.
Now is the time to enhance your understanding of "Current Electricity - Ohms Law"! Dive into our practice MCQs and test your knowledge to ensure you are well-prepared for your upcoming exams.
