Question

A bulb is rated 40 W; 220 V. Find the current drawn by it, when it is connected to a 220 V supply. Also find its resistance. If the given bulb is replaced by a bulb of rating 25 W; 220 V, will there be any change in the value of current and resistance ? Justify your answer and determine the change.

Answer 1

We know that power is given by P=VI

⟹I=

V

P

=

220

40

⟹I=0.1818A

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Answer 2

Answer:

8x 4 y–7x 3 yz+4/3x 2 yz 2−2.5xyz.Whatistheco−efficientofx 2 intheterm4/3x 2 yz ...