Question

A cylindrical conductor of length 'l and uniform area of cross-section A:
has resistance 'R'. Another conductor of length 2.5 l and resistance 0-5 R
of the same material has area of cross-section​

Answer 1

Answer:

(B)

10-3 A and 10-6 A respectively

(C)

10-3 A and 10-9 A respectively

(D)

10-6 A and 10-3 A respectively

8.

A cylindrical conductor of length T and uniform area of cross-section A

tance R. Another conductor of length 2.5 L and resistance 0.5 R

has resistance 'R'. Another conductor of len

of the same material has area of cross-section

(A)

5A

2.5 A

(B)

(C)

(D)

0-5 A

A

9.

The image distance from the eye lens in the normal eye when we increase

the distance of an object from the eye

(A)

increases.​

Answer:

 

Explanation:

 

Explanation:

Answer 2

Answer:

5A

Explanation:

As per information given in question statement, the solution is;

Formula of resistance is R=p L / A

Now if R' = 0.5R and L' = 2.5L

Then A' will be;

0.5R = p 2.5L/ A'

A' = 5 p L/ R

A' = 5 A

Hence the new area will be 5 times more than the original area