Question

Please solve the 25th one

Answer 1

Answer:

answer is

Explanation:

R1 andR2are parallel resitor,so1/10+1/40=50/400-1

Answer 2

Answer:

R1&R2 are parallel resistors,

so 1/10+1/40= 50/400=1/8

1/ equivalent resistance of r1&r2

equivalent resistance of r1&r2= 8

again, R3,R4&R5 are parallel

1/30+1/20+1/60=6/60=1/10

equivalent resistance of r3,r4 and r5 is 10

total equivalent resistance is 8+10=18.

I =R/V

18/12=3/2