Advertisements
Advertisements
प्रश्न
State the two Kirchhoff’s rules used in the analysis of electric circuits and explain them.
Advertisements
उत्तर
- Junction rule: At any junction, the sum of the currents entering the junction is equal to the sum of currents leaving the junction.
- Loop rule: The algebraic sum of changes in potential around any closed loop involving resistors and cells in the loop is zero.
APPEARS IN
संबंधित प्रश्न
Kirchhoff's junction law is equivalent to .............................
(a) conservation of energy.
(b) conservation of charge
(c) conservation of electric potential
(d) conservation of electric flux
The current is drawn from a cell of emf E and internal resistance r connected to the network of resistors each of resistance r as shown in the figure. Obtain the expression for
- the current draw from the cell and
- the power consumed in the network.
Determine the equivalent resistance of networks shown in Fig.
Two unequal resistances, R1 and R2, are connected across two identical batteries of emf ε and internal resistance r (see the figure). Can the thermal energies developed in R1 and R2 be equal in a given time? If yes, what will be the condition?
Solve the following question.
Using Kirchhoff’s rules, calculate the current through the 40 Ω and 20 Ω resistors in the following circuit.
Explain the determination of unknown resistance using meter bridge.
Two cell of 1.25 V and 0.75 V are connected parallel. The effective voltage will be:-
What are the advantages of the null-point method in a Wheatstone bridge? What additional measurements would be required to calculate `R_(unknown)` by any other method?
What is the advantage of using thick metallic strips to join wires in a potentiometer?
The value of current in the 6Ω resistance is ______.
