Q. 24.8( 4 Votes )

# Two resistors A a A. ρ_{A} > ρ_{B}

B. ρ_{A} = ρ_{B}

C. ρ_{A} < ρ_{B}

D. The information is not sufficient to find the relation between ρ_{A} and ρ_{B}.

Answer :

Given :

Resistance of resistor A, R_{A}< Resistance of resistor B, R_{B}

Formula used : Resistance is given by the formula

Where

R is the resistance

ρ is the resistivity

l is the length

A is the area of cross section

Resistance is

Resistance is

Only the relation between resistance values of and is given. R is depends on ρ, *l* and With the information given we cannot conclude the relation between resistivity of the two resistors.

If information about ρ, *l* and A is given then we can say the relation between ρ_{A} and ρ_{B.} So option D is correct.

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