Question

Calculate the electric current in the given circuit when
(i) key K1 is open and K2 is closed
(ii) both the keys are closed
(iii) K1 is closed and K2 is openm​

Answer 1

Explanation:

i. if k1 is opened the circuit isn't complete hence

i=0 coloumbs

II. both keys are open hence circuit is completed

hence

according to v=ir

i=v/r

here

r= 4+4=8 .......in series

and 8/2 =4..... in parallel

r=4ohm

and v=12v

hence

i=12/4=3 coloumbs

III. if k2 is opened then circuit completed through only k1

hence

i=v/r

r= 4+4=8 in series

and v=12v

i=12/8

i=3/2coloumbs

Answer 2

Explanation:

hope it helps you all friends