Question

7. A wire has potential across it as 40 volt and a 4A of current is flowing through it the resistance of wire is?

(a) 4 Q (b) 40 Q (c) 10

(d) 8

8. Which of the following represents voltage?

(a) Work done / Current Time (c) Work done x Time / Current

(b)Work done x Charge Work done /Charge) x Time​

Answer 1

Answer:

7. BY OHM'S LAW

V= IR.

$40 = 4 \times r$

$r = 10$

resistance of wire is 10 ohm

Explanation:

8) A) WORK DONE PER CURRENT TIME

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Answer 2

Answer:

7. c 10

8.a

Explanation:

7. V=IR

V=40 V

I=4 A

V=IR

V/I=R. R=40/4=10 ohms

8. we know that potential difference (V)=Work Done/charge carried

now charge =current ×time

so answer is a