# How Well Do You Know About Kirchoff's Laws?

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
| By Tanya Mishra
T
Tanya Mishra
Community Contributor
Quizzes Created: 606 | Total Attempts: 1,076,300
Questions: 10 | Attempts: 348

Settings

Do you love to learn and study physics? We welcome you to this exciting Kirchhoff's Laws Quiz! Are you familiar with the concept? The law states that the voltage around the loop in a system is equal to the voltage drop in the same loop, given that the system is a closed system. We encourage you to take this quiz to test your knowledge. Maybe you'll learn something new, wouldn't that be fun? All the questions are carefully curated to give you an in-depth understanding of the concept, so you can even use the quiz for your upcoming examination prep. Read moreGood Luck!

• 1.

### Kirchhoff's 1st law is the consequence of the law of conservation of what?

• A.

Momentum

• B.

Power

• C.

Voltage

• D.

Charge

D. Charge
Explanation
Kirchhoff's 1st law is the consequence of the law of conservation of charge. This law states that the total amount of electric charge in a closed system remains constant over time. According to Kirchhoff's 1st law, the sum of currents entering a junction in an electrical circuit is equal to the sum of currents leaving the junction. This is based on the principle that charge cannot be created or destroyed, only transferred or redistributed within a system.

Rate this question:

• 2.

### What does Kirchhoff's 2nd law deal with?

• A.

Current in circuit

• B.

Magnetism in the circuit

• C.

Voltage and e.m.f in circuit

• D.

None of the above

C. Voltage and e.m.f in circuit
Explanation
Kirchhoff's 2nd law, also known as Kirchhoff's voltage law (KVL), deals with the conservation of energy in an electrical circuit. It states that the sum of the voltages around any closed loop in a circuit is equal to zero. This law is used to analyze and solve complex circuits by considering the voltage drops and rises across different components in the circuit. Therefore, the correct answer is "Voltage and e.m.f in circuit."

Rate this question:

• 3.

### Which of the following law can be used to analyze the circuits?

• A.

Kirchhoff's law

• B.

Newton's law

• C.

Coulomb's law

• D.

None of the above

A. Kirchhoff's law
Explanation
Kirchhoff's law can be used to analyze circuits. Kirchhoff's laws are fundamental principles in electrical circuit analysis. They are used to determine the voltages and currents in a circuit by considering the conservation of charge and energy. These laws provide a mathematical framework for analyzing complex circuits and are widely used in electrical engineering. Newton's law is related to the motion of objects, while Coulomb's law deals with the electrostatic force between charged particles. Therefore, neither of these laws is applicable for circuit analysis.

Rate this question:

• 4.

### What happens to the current that goes through each resistor when connected in series?

• A.

Increases

• B.

Decreases

• C.

Stays the same

• D.

Fluctuates rapidly

C. Stays the same
Explanation
When resistors are connected in series, the current flowing through each resistor remains the same. This is because the current in a series circuit has only one path to flow through, and it encounters the same resistance in each resistor. Therefore, the current does not increase or decrease, but stays constant throughout the circuit.

Rate this question:

• 5.

### What is the other name of Kirchhoff’s First Law?

• A.

Kirchhoff’s voltage law

• B.

Kirchhoff’s Current Law

• C.

Kirchhoff’s magnetism law

• D.

None of the above

B. Kirchhoff’s Current Law
Explanation
Kirchhoff's First Law is also known as Kirchhoff's Current Law. This law states that the algebraic sum of currents meeting at any node (junction) in an electrical circuit is zero. In other words, the total current flowing into a node is equal to the total current flowing out of that node. This law is based on the principle of conservation of charge in a circuit.

Rate this question:

• 6.

### If the two 10 Ω resistors are connected in parallel, what is their equivalent resistance?

• A.

20 Ω

• B.

15 Ω

• C.

10 Ω

• D.

5 Ω

D. 5 Ω
Explanation
When two resistors are connected in parallel, the equivalent resistance is calculated using the formula 1/Req = 1/R1 + 1/R2. In this case, the two resistors have the same value of 10 Ω. Plugging in the values, we get 1/Req = 1/10 + 1/10 = 2/10. Simplifying, we find that 1/Req = 1/5. Taking the reciprocal of both sides, we get Req = 5 Ω. Therefore, the equivalent resistance of the two 10 Ω resistors connected in parallel is 5 Ω.

Rate this question:

• 7.

### What is the difference in electrical potential energy between two places?

• A.

Current

• B.

Voltage

• C.

Resistance

• D.

Insulation

B. Voltage
Explanation
Voltage is the correct answer because it represents the difference in electrical potential energy between two places. It is a measure of the electric potential difference or the force that pushes electric charges through a circuit. Voltage is measured in volts and determines the flow of current in a circuit.

Rate this question:

• 8.

### Which of the following equation applies the equation → ∑e = ∑IR?

• A.

Kirchhoff’s second law

• B.

Kirchhoff’s third law

• C.

Kirchhoff’s junction rule

• D.

None of the above

A. Kirchhoff’s second law
Explanation
Kirchhoff's second law, also known as Kirchhoff's loop rule, states that the sum of the electromotive forces (e) in any closed loop of a circuit is equal to the sum of the products of the current (I) and resistance (R) in that loop. This equation, ∑e = ∑IR, accurately represents Kirchhoff's second law. Kirchhoff's third law and junction rule are not applicable in this context.

Rate this question:

• 9.

### Three resistances of 20 Ω, 30 Ω, and 60 Ω are connected in parallel, what is the value of their combined resistance?

• A.

100 Ω

• B.

50 Ω

• C.

20 Ω

• D.

10 Ω

D. 10 Ω
Explanation
When resistances are connected in parallel, the combined resistance is given by the formula: 1/R = 1/R1 + 1/R2 + 1/R3 + ... In this case, the combined resistance is 1/R = 1/20 + 1/30 + 1/60. Simplifying this equation gives 1/R = 3/60 + 2/60 + 1/60 = 6/60 = 1/10. Taking the reciprocal of both sides gives R = 10 Ω, so the combined resistance is 10 Ω.

Rate this question:

• 10.

### Kirchhoff's 1st law deals with what?

• A.

Current in the circuit

• B.

Voltage in the circuit

• C.

E.M.F in the circuit

• D.

None of the above

A. Current in the circuit
Explanation
Kirchhoff's 1st law, also known as Kirchhoff's current law (KCL), deals with the conservation of electric charge in a circuit. It states that the total current entering a junction in a circuit is equal to the total current leaving that junction. This law is based on the principle of conservation of charge and is used to analyze and solve complex electrical circuits. Therefore, the correct answer is "Current in the circuit."

Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

• Current Version
• Nov 16, 2023
Quiz Edited by
ProProfs Editorial Team
• Nov 15, 2022
Quiz Created by
Tanya Mishra

Related Topics