Tag: kirchoff's law and problems on it

Questions Related to kirchoff's law and problems on it

Point out the right statements about the validity of Kirchhoff's junction rule.

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. It is based on conservation of charge

  2. Outgoing currents add up and are equal to incoming currents at a junction

  3. Bending or reorienting the wire does not change the validity of Kirchhoff's junction rule

  4. All of above

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Correct Option: D
Explanation:

By Kirchhoff's junction rule. Incoming current $=$ Outgoing current

The net charge is conserved and it is based on conservation of charge.
Also bending or reorienting the wire does not invalidate the conservation of charge principle. So, option D is correct.

Kirchoff's junction law is equivalent to ___________.

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. Conservation of energy

  2. Conservation of charge

  3. Conservation of electric potential

  4. Conservation of electric flux

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Correct Option: B
Explanation:

Kirchhoff's junction rule is an application of the principle of conservation of electric charge: current is flow of charge per time, and if current is constant, that which flows into a point in a circuit must equal that which flows out of it. 

Kirchoffs law of junctions is also called the law of conservation of:

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. Energy

  2. Charge

  3. Momentum

  4. Angular momentum

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Correct Option: B
Explanation:

Kirchoff's second law:- According to the law, at a particular junction the charge entering the junction is equal to charge exiting that junction.
$ \Rightarrow$ There is no charge accumulated at junction. This is also called as law of conservation of charge.

Consider the following two statements:
(A) Kirchhoff's Junction Law follows from conservation of charge.
(B) Kirchhoff's Loop Law follows from conservative nature of electric field.

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. Both A and B are correct

  2. A is correct but B is wrong

  3. A is correct but A is wrong

  4. Both A and B are wrong

Show answer
Correct Option: A
Explanation:

Kirchhoff's Junction law states that total current(charge) entering the junction is equal to total current(charge) leaving the junction hence, total charge across junction remains conserved.
Also, Kirchhoff's loop law states that the directed sum of the electrical potential differences (voltage) around any closed network is zero or the sum of the emfs in any closed loop is equivalent to the sum of the potential drops in that loop. 

Kirchoff's first law, i.e., $\sum    i = 0$ at a junction, deals with the conservation of

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. charge

  2. energy

  3. momentum

  4. angular momentum

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Correct Option: A
Explanation:

The principle of conservation of electric charge implies that: at any node (junction) in an electrical circuit , the sum of currents flowing into that node is equal to the sum of currents flowing out of that node. This is known as Kirchhoff's current law.

Consider the following two statements:
1) Kirchoff's junction law follows from the conservation of charge
2) Kirchoff's loop law follows from the conservation of energy. 
Which of the following is correct?

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. both 1 and 2 are wrong

  2. 1 is correct and 2 is wrong

  3. 1 is wrong and 2 is correct

  4. both 1 and 2 are correct

Show answer
Correct Option: D
Explanation:

Kirchhoff's loop law follows conservation of energy, nature of electric field.

Kirchhoff's junction law follows from the conservation of charge.

State whether given statement is True or False
The sum of all the voltage drops around a single closed loop in a circuit is zero.

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. True

  2. False

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Correct Option: A
Explanation:
Kirchhoff's Second Law – The Voltage Law, (KVL)
Kirchhoff's Voltage Law or KVL, states that “in any closed loop network, the total voltage around the loop is equal to the sum of all the voltage drops within the same loop” which is also equal to zero. In other words the algebraic sum of all voltages within the loop must be equal to zero. This idea by Kirchhoff is known as the Conservation of Energy.

Between any two points in a circuit, the sum of all .............. is the same through any pathway.

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. charge

  2. current

  3. potential difference

  4. resistance

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Correct Option: C
Explanation:

Kirchhoff's voltage law says that if we add up all the voltage drops that occur around the loop, the total will be equal to the total voltage applied across the loop.hence between any two point in the circuit , the sum of all the voltage drops is the same through any pathway.

Kirchoff's voltage law and current law are respectively in accordance with the conservation of 

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. Charge and momentum

  2. Charge and energy

  3. Energy and charge

  4. Energy and momentum

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Correct Option: A

Kirchhoff's junction law is equivalent to 

physics kirchhoff's law circuit problems kirchoff's law and problems on it equivalent resistance in series and parallel connection

  1. conservation of energy

  2. conservation of charge

  3. conservation of electric potential

  4. conservation of electric flux

Show answer
Correct Option: A