Question

Three resistors of resistances 4 Ω, 6 Ω, and 12 Ω be connected to give a total resistance of 8 Ω,
1) I AND II SERIES AND III IN PARALLEL
2) II AND III ARE IN SERIES AND I IN PARALLEL
3) I AND II ARE PARALLEL AND III IN SERIES
4) II AND III ARE IN PARALLEL AND I IN SERIES
5) NONE OF ABOVE
( select correct option ) ​

Answer 1

The correct option from the following option is 4

Answer 2

Answer:

4 option is correct

Explanation:

R1=4 R2=6 R3=12

• 1/R=1/R2+1/R3
• 1/R=1/6+1/12
• 1/R=3/12(lcm)
• 1/R=1/4
• R^'=4

R=R^'+R1

R=4+4

R=8