First slide

Electrical power

Question

In the circuit shown in fig. the rate of heat produced in the 5 ohm resistor is 20 J $s^{- 1}$

Moderate

A

The current in the 6 ohm resistor is 1 A.
B

The current in the 5 ohm resistor is 2 A.
C

The rate of heat produced in the 4 ohm resistor is 4 J $s^{- 1}$ .
D

All of these are correct

Solution

$f o r 5 o h m r e s i s t o r i^{2} 5 = 20 i = 2 A c u r r e n t i n t h e u p p e r b r a n c h w i l l b e 1 A a s r e s i s \tan c e i s d o u b l e 10 o h m i n 4 o h m r e s i \tan c e p o w e r c o n s u m p t i o n 1^{2} 4 = 4 J s^{- 1}$

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