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NEET Class neet Answered

Find power dissipated in 3ohm resistor
question image
Asked by meeragurumani2000 | 14 Jul, 2020, 09:38: AM
answered-by-expert Expert Answer
E f f e c t i v e space p a r a l l e l space r e s i s tan c e
1 over R equals 1 third plus 1 over 6
1 over R equals fraction numerator 2 plus 1 over denominator 6 end fraction
R equals 2
T h e r e f o r e space t h e space t o t a l space r e s i s tan c e space o f space t h e space c i r c u i t space i s
R subscript e f f end subscript equals 2 plus 4 equals 6 capital omega
C u r r e n t space f l o w i n g space i n space t h e space c i r c u i t space
V equals I R
18 equals I cross times 6
I equals 3 A
V o l t a g e space d r o p space a c r o o s space 4 space o h m
V subscript 4 equals 3 cross times 4 equals 12 V
T h e n space V o l t a g e space d r o p space a c r o s s space t h e space p a r a l l e l space r e s i s tan c e s space w o u l d space b e
6 V
P o w e r space d i s s i p a t e d space i n space 3 space o h m space r e s i s tan c e space w i l l space b e
P equals 6 squared over 3 equals 36 over 3 equals 12 W
Answered by Utkarsh Lokhande | 14 Jul, 2020, 14:51: PM
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