Question

two devices of rating 44 w, 220 v and 11w, 220 v e are connected in series the combination is connected across the 440V mains. the fuse of which of the two devices is likely to burn when the switch is on? justify your answer​

Answer 1

Answer:

Explanation:

Solution,

Here, we have

Fuse of device of rating 11 W and 220 V,

R = V²/W

Now, the resistances,

For 11 W = 220²/11

= 4400

For 44 W = 220²/44

= 1100

Hence, we can say that,

Resistance of 11 W device will be of four times of device of 44 W.

Now, we know that,

I = V/R

I = 4400/5500

I = 0.08

Now, voltage

for 11 W device = 0.08 × 4400 = 352 V

for 44 W device = 0.08 × 1100 = 88 V

Answer 2

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