Advertisements
Advertisements
Question
State Kirchhoff’s current rule.
Advertisements
Solution
- Kirchhoff’s current rule states that the algebraic sum of the currents at any junction of a circuit is zero.
i.e `Σ_"junction"` i = 0 - It is a statement of conservation of electric charge.
APPEARS IN
RELATED QUESTIONS
Kirchhoff's voltage law and current law are respectively in accordance with the conservation of .................................. .
- charge and momentum
- charge and energy
- energy and charge
- energy and momentum
State Kirchhoff's rules and explain on what basis they are justified.
In the given circuit, assuming point A to be at zero potential, use Kirchhoff’s rules to determine the potential at point B.

Twelve wires each having a resistance of 3 Ω are connected to form a cubical network. A battery of 10 V and negligible internal resistance is connected across the diagonally opposite corners of this network. Determine its equivalent resistance and the current along each edge of the cube.
A copper wire of 10-6 m2 area of cross-section, carries a current of 2 A. If the number of electrons per cubic meter is 8 × 1028, calculate the current density and average drift velocity.
The figure below shows current in a part of electric circuit. The current I is ______.

What is the advantage of using thick metallic strips to join wires in a potentiometer?
Power P is to be delivered to a device via transmission cables having resistance RC. If V is the voltage across R and I the current through it, find the power wasted and how can it be reduced.
The figure below shows two batteries, E1 and E2, having emfs of 18V and 10V and internal resistances of 1 Ω and 2 Ω, respectively. W1, W2 and W3 are uniform metallic wires AC, FD and BE having resistances of 8 Ω, 6 Ω and 10 Ω respectively. B and E are midpoints of the wires W1 and W2. Using Kirchhoff's laws of electrical circuits, calculate the current flowing in the wire W3:

