Q. What is the total current flowing through a circuit if the total voltage is 12 V and the total resistance is 4 ohms?
A.
3 A
B.
4 A
C.
12 A
D.
48 A
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Solution
Using Ohm's Law, I = V / R. Here, I = 12 V / 4 ohms = 3 A.
Correct Answer:
A
— 3 A
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Q. What is the total current flowing through a circuit if the total voltage is 12V and the total resistance is 4Ω?
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Solution
Using Ohm's Law (I = V/R), the current is I = 12V / 4Ω = 3A.
Correct Answer:
B
— 3A
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Q. What is the total current flowing through a circuit if the total voltage is 24V and the total resistance is 6Ω?
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Solution
Using Ohm's Law, I = V/R = 24V / 6Ω = 4A.
Correct Answer:
B
— 4A
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Q. What is the total current flowing through a circuit with a 10V battery and two 5Ω resistors in series?
A.
0.5A
B.
1A
C.
2A
D.
5A
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Solution
Total resistance R = R1 + R2 = 5Ω + 5Ω = 10Ω. Using Ohm's law, I = V/R = 10V/10Ω = 1A.
Correct Answer:
B
— 1A
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Q. What is the total current flowing through a circuit with a 10V battery and two 5Ω resistors in parallel?
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Solution
Equivalent resistance R_eq = 1/(1/5 + 1/5) = 2.5Ω. Total current I = V/R_eq = 10V/2.5Ω = 4A.
Correct Answer:
B
— 2A
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Q. What is the total current flowing through a junction where 5A enters and 3A and 2A leave?
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Solution
According to Kirchhoff's Current Law, the total current entering a junction equals the total current leaving. Here, 5A = 3A + 2A.
Correct Answer:
A
— 0A
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Q. What is the total current in a circuit with a 10V battery and two 5 ohm resistors in parallel?
A.
1 A
B.
2 A
C.
3 A
D.
4 A
Show solution
Solution
Equivalent resistance R_eq = 1/(1/5 + 1/5) = 2.5 ohms. Total current I = V/R_eq = 10V / 2.5Ω = 4 A.
Correct Answer:
B
— 2 A
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Q. What is the total current in a circuit with a 12V battery and a total resistance of 3 ohms?
A.
4 A
B.
2 A
C.
3 A
D.
1 A
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Solution
Using Ohm's law, I = V/R, we have I = 12V / 3 ohms = 4 A.
Correct Answer:
A
— 4 A
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Q. What is the total current in a circuit with a 12V battery and three 4 ohm resistors connected in series?
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Solution
Total resistance R_total = 4 + 4 + 4 = 12 ohms. Current I = V/R_total = 12V / 12 ohms = 1A.
Correct Answer:
B
— 2A
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Q. What is the total current in a circuit with a 12V battery and three resistors (R1 = 4Ω, R2 = 4Ω, R3 = 4Ω) connected in parallel?
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Solution
Total resistance R_eq = 1 / (1/R1 + 1/R2 + 1/R3) = 1 / (1/4 + 1/4 + 1/4) = 1.33Ω. Current I = V / R_eq = 12V / 1.33Ω ≈ 9A.
Correct Answer:
B
— 4A
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Q. What is the total current in a circuit with a 12V battery and two 4 ohm resistors in series?
A.
1 A
B.
2 A
C.
3 A
D.
4 A
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Solution
Total resistance R = R1 + R2 = 4 + 4 = 8 ohms. Current I = V/R = 12V / 8 ohms = 1.5 A.
Correct Answer:
B
— 2 A
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Q. What is the total current in a circuit with a 24V battery and three resistors (2Ω, 4Ω, and 6Ω) connected in series?
Show solution
Solution
Total resistance R = R1 + R2 + R3 = 2Ω + 4Ω + 6Ω = 12Ω. Using Ohm's law, I = V/R = 24V / 12Ω = 2A.
Correct Answer:
B
— 3A
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Q. What is the total current in a circuit with a 9V battery and a 3Ω resistor?
Show solution
Solution
Using Ohm's law, I = V/R = 9V/3Ω = 3A.
Correct Answer:
B
— 2A
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Q. What is the total current in a circuit with a 9V battery and two 3Ω resistors in parallel?
Show solution
Solution
Total resistance R = 1/(1/3 + 1/3) = 1.5Ω; I = V/R = 9V/1.5Ω = 6A.
Correct Answer:
B
— 2A
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Q. What is the total current in a circuit with two branches, one carrying 2 A and the other 3 A?
A.
5 A
B.
6 A
C.
1 A
D.
0 A
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Solution
In a parallel circuit, the total current is the sum of the currents in each branch: I_total = I1 + I2 = 2 A + 3 A = 5 A.
Correct Answer:
A
— 5 A
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Q. What is the total power consumed in a circuit with a 12V battery and a 4Ω resistor?
A.
12W
B.
24W
C.
36W
D.
48W
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Solution
Power P = V^2/R = (12V)^2/4Ω = 36W.
Correct Answer:
B
— 24W
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Q. What is the total power consumed in a circuit with a current of 5A and a total resistance of 4Ω?
A.
10W
B.
20W
C.
30W
D.
40W
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Solution
Power (P) = I^2 * R = 5^2 * 4 = 25 * 4 = 100W.
Correct Answer:
D
— 40W
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Q. What is the total resistance in a circuit with a 10Ω resistor in series with a 5Ω resistor?
A.
5Ω
B.
10Ω
C.
15Ω
D.
50Ω
Show solution
Solution
In series, total resistance (R_total) = R1 + R2 = 10Ω + 5Ω = 15Ω.
Correct Answer:
C
— 15Ω
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Q. What is the total resistance in a circuit with a 12 ohm and a 4 ohm resistor connected in parallel?
A.
3 ohms
B.
4 ohms
C.
9 ohms
D.
16 ohms
Show solution
Solution
1/R_eq = 1/12 + 1/4 => R_eq = 3 ohms.
Correct Answer:
A
— 3 ohms
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Q. What is the total resistance in a circuit with a 12Ω resistor and a 4Ω resistor connected in series?
A.
16Ω
B.
48Ω
C.
3Ω
D.
8Ω
Show solution
Solution
In series, total resistance R_total = R1 + R2 = 12Ω + 4Ω = 16Ω.
Correct Answer:
A
— 16Ω
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Q. What is the total resistance of a circuit with a 3Ω and a 5Ω resistor in series?
A.
8Ω
B.
15Ω
C.
2Ω
D.
1.5Ω
Show solution
Solution
Total resistance R = R1 + R2 = 3Ω + 5Ω = 8Ω.
Correct Answer:
A
— 8Ω
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Q. What is the total resistance of two 10 ohm resistors connected in parallel?
A.
5 ohms
B.
10 ohms
C.
20 ohms
D.
15 ohms
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Solution
1/R_eq = 1/R1 + 1/R2 = 1/10 + 1/10 = 2/10. Thus, R_eq = 10/2 = 5 ohms.
Correct Answer:
A
— 5 ohms
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Q. What is the total resistance of two 10 ohm resistors connected in series?
A.
5 ohms
B.
10 ohms
C.
20 ohms
D.
15 ohms
Show solution
Solution
In series, R_eq = R1 + R2 = 10 + 10 = 20 ohms.
Correct Answer:
C
— 20 ohms
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Q. What is the total resistance of two 12 ohm resistors connected in parallel?
A.
6 ohms
B.
12 ohms
C.
24 ohms
D.
18 ohms
Show solution
Solution
1/R_eq = 1/R1 + 1/R2 = 1/12 + 1/12 = 2/12. Thus, R_eq = 12/2 = 6 ohms.
Correct Answer:
A
— 6 ohms
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Q. What is the total resistance of two 8Ω resistors connected in series?
A.
8Ω
B.
16Ω
C.
4Ω
D.
12Ω
Show solution
Solution
In series, R_eq = R1 + R2 = 8 + 8 = 16Ω.
Correct Answer:
B
— 16Ω
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Q. What is the total resistance of two resistors of 5 ohms and 10 ohms connected in parallel?
A.
3.33 ohms
B.
5 ohms
C.
15 ohms
D.
50 ohms
Show solution
Solution
1/R_eq = 1/5 + 1/10 => R_eq = 3.33 ohms.
Correct Answer:
A
— 3.33 ohms
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Q. What is the total resistance of two resistors of 8Ω and 12Ω connected in series?
A.
20Ω
B.
24Ω
C.
16Ω
D.
18Ω
Show solution
Solution
In series, R_eq = R1 + R2 = 8 + 12 = 20Ω.
Correct Answer:
A
— 20Ω
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Q. What is the total voltage across a parallel circuit with two branches, one with 10Ω and 20Ω resistors, if the total current is 3A?
A.
6V
B.
9V
C.
12V
D.
15V
Show solution
Solution
Using the formula V = I * R_eq. First, find R_eq = 1 / (1/10 + 1/20) = 6.67Ω. Then, V = 3A * 6.67Ω = 20V.
Correct Answer:
C
— 12V
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Q. What is the total voltage in a series circuit with a 9V battery and two resistors of 2Ω and 3Ω?
Show solution
Solution
In a series circuit, the total voltage is equal to the voltage of the battery, which is 9V.
Correct Answer:
A
— 9V
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Q. What is the unit of electrical resistance?
A.
Volt
B.
Ampere
C.
Ohm
D.
Watt
Show solution
Solution
The unit of electrical resistance is Ohm.
Correct Answer:
C
— Ohm
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Showing 541 to 570 of 607 (21 Pages)
Current Electricity MCQ & Objective Questions
Current Electricity is a crucial topic in physics that students must master for their exams. Understanding this concept not only helps in grasping fundamental principles but also significantly boosts your performance in objective questions. Practicing MCQs and important questions related to Current Electricity can enhance your exam preparation and increase your chances of scoring higher marks.
What You Will Practise Here
Ohm's Law and its applications
Series and parallel circuits
Electrical power and energy calculations
Resistance, resistivity, and factors affecting resistance
Kirchhoff's laws and their practical applications
Concept of current, voltage, and their relationship
Diagrams and circuit analysis techniques
Exam Relevance
The topic of Current Electricity is frequently tested in various examinations, including CBSE, State Boards, NEET, and JEE. Students can expect questions that assess their understanding of fundamental concepts, application of formulas, and problem-solving skills. Common question patterns include numerical problems, theoretical questions, and circuit analysis, making it essential to be well-prepared with Current Electricity MCQ questions.
Common Mistakes Students Make
Confusing current with voltage and their units
Misapplying Ohm's Law in complex circuits
Overlooking the effects of temperature on resistance
Failing to differentiate between series and parallel connections
Neglecting to draw circuit diagrams for better understanding
FAQs
Question: What is the formula for calculating electrical power?Answer: The formula for electrical power is P = VI, where P is power, V is voltage, and I is current.
Question: How does resistance change in series and parallel circuits?Answer: In series circuits, total resistance increases, while in parallel circuits, total resistance decreases.
Now is the time to enhance your understanding of Current Electricity! Dive into our practice MCQs and test your knowledge to ensure you are well-prepared for your exams. Start solving today and boost your confidence!
