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DC basic and Networks MCQ Set-2 Question 6:-

The condition for the validity of Ohm’s law is that the

(a) temperature should remain constant.
(b) current should be proportional to voltage.
(c) resistance must be wire wound type.
(d) all of the above.

Ans: (a) temperature should remain constant.

DC basic and Networks MCQ Question 7:-

If the length of a wire of resistance R is uniformly stretched to n times its original value, its new resistance is

(a) n R
(b) R/n
(c) n^2 x R
(d) R / n ^ 2

Ans: (c) n^2 x R

DC basic and Networks MCQ Question 8:-

What happens to the resistance of a conductor if its length is increased three times and diameter is halved?

(a) Resistance remains the same.
(b) Resistance is increased 3 times.
(c) Resistance is increased 6 times.
(d) Resistance is increased 12 times.

Ans: (d) Resistance is increased 12 times

DC basic and Networks MCQ Question 9:-

A drawn wire of resistance 5 2 is further drawn so that its diameter becomes one-fifth of the original. What is its resistance with volume remaining the same?

(a) 25 Ω
(b) 125 2
(c) 625 Ω
(d) 3,125 Ω

Ans: (d) 3,125 Ω ✔

If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as Retrograde vernier.

DC basic and Networks MCQ Question 10:-

The elements which are not capable of delivering energy by its own are known as

(a) unilateral elements.
(b) nonlinear elements.
(c) passive elements.
(d) active elements.

Ans: (c) passive elements. ✔

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