The electrical resistivity of material A is $2.3 \times 1 0^{- 8} Ω m$ and material B is $1.0 \times 1 0^{- 15} Ω m$ . material A will be a better conductor than material B.

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

True

False

answer is B.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

The given statement is false.
Due to less resistivity, material B will be a good conductor of electricity. The resistivity of a substance is a property by which it impedes the flow of current. The more resistivity will be, the less will be the current flow. Insulators have very high resistivity, while conductors have significantly less resistivity. Resistivity is represented by

(rho)

. The SI unit of resistivity is

Ωm

.
The formula for resistivity is,
Resistivity

(ρ) = \frac{R \times A}{l}

Where,

R = resistance of the conductor

A = area of cross - section of the conductor

l = length of the conductor

The resistivity of a substance does not depend on its length or thickness. It depends on the nature of the substance and temperature.
The corrected statement would be that material B will be a better conductor than material A.

Watch 3-min video & get full concept clarity