Question: Q. 1. State Kirchhoff’s laws of current distribution in an electrical network.
Using these rules determine the value of the current
R&A [Delhi I, II, III 2014]
Show Answer
Solution:
Ans. (i) Kirchhoff’s laws 1
(ii) Finding value of current
[CBSE Marking Scheme 2014]
Detailed Answer :
(i) Try yourself Similar to Q. 1, Short Answer Type Question-I
(ii) Now from the given figure,
For
For
Now solving eqns. (iii) and (iv),
We get
and
Now, from equation (ii),
[AI Q. 2. Using Kirchhoff’s rules, calculate the potential difference between
A [CBSE-2018 Comptt.]
Sol. Writing the two loop equations
Finding the current through DB
Finding the p.d. between B and D
Using Kirchhoff’s voltage rule, we have :
For loop
Or
..(i)
For loopDCBD
Or
…(ii)
Solving (i) and (ii), we get
[CBSE Marking Scheme 2018]