Question
Tue December 11, 2012

Thu December 13, 2012

Kirchoff's current law:
The current flowing in a conductor towards the junction is taken as positive and the current flowing away from the junction is taken as negative.

Kirchoff's voltage law:
Traverse a closed path of a circuit once completely in clockwise or anticlockwise direction.
While traversing a loop if negative pole of the cell is encountered first, then its emf is negative, otherwise positive.
The product of resistance and current in an arm of the circuit is taken positive if the direction of current in that arm is in the same sense as one moves in a closed path and is taken negative if the direction of current in that arm is opposite to the sense as one moves in a closed path.
Related Questions
Wed January 18, 2017

# A cell of emf E and internal resistance r is connected to two external resistance R1 and R2 and a perfect ammeter.The current in the circuit is measured in four different situation: (i)without any external resistance in the circuit (ii)with resistance R1 only (iii)with Ri and R2 in series combination (iv)with R1 and R2 in parallel combination The currents measured in the four cases are 0.42A,1.05A,1.4A and 4.2A,but not necessarily in that order.Identify the currents corresponding to the four cases mentioned above.

Thu November 24, 2016