Question

The information about V-I graph of 4 resistors, A,B,C and D is given below. If all the 4 resistors are of same length and same material, then which one of the resistor will have the minimum cross sectional area? Explain.
● V =1 & I=4
●V=2 & I=3
●V=3 & I=2
●V=4 & I=1

Answer 1

Answer:

v=4 and i=1

Explanation:

resistance is v/i and pl/a (p is resistivity)

since r is inversely proportional to area higher the resistance lesser the area of cross section

Answer 2

Explanation:

v = ir

for a r = 1/4

for b r = 2/3

for c r = 3/2

for d r = 4/1

now as resistance and area are inversely related so highest resistance will have least cross sectional area thus answer is d as its resistance is 4 ie highest