Question

numerical of electricity
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Answer 1

Explanation:

The electric iron will have equivalent resistance to the same as 100 Ω, 50 Ω and 500 Ω resistors are in parallel.

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you need to study ohms law

Answer 2

Explanation:

(i)R=Afl

According to the question

R1=π(1×10−3)2fl     R2=π(2×10−3)2fl

R2R1=(1×10−3)2(2×10−3)2=14

Thus,R1:R2::4:1  i.e, first resistance