Calculate the resistance of a metal wire of length 2m and area of cros

1.	Calculate the resistance of a metal wire of length 2m and area of cross section 1.5510to the power -6, if the resistivity of metal be 2.810to the power -8.
Answer» ANSWER: RESISTANCE ( R ) = 36 × 10-³ Ω ( ohms) Explanation: ★ CURRENT ELECTRICITY ★ ★ GIVEN ; » Length of Wire ( L ) = 2 m » Area of Cross - Section ( A ) = 1.55 × 10^-6 m² » RESISTIVITY ( p ) = 2.8 × 10^-8 ★ RESISTANCE ( R ) = ??? _________________________________________ ———— [ BY USING FORMULA ] ———— [ $r \: = \: p \: ( \: \frac{l}{a} \: )$ ] ★ R = 2.8 × 10^-8 × [ 2 / 155 × 10^-8 ] » R = 2.8 × 10^-8 × [ 2 × 10^8 / 155 ] » R = [ 2.8 × 2 ] / 155 » R = [ 5.6 ] / 155 » R = 0.036 Ω *★ » RESISTANCE ( R ) = 36 × 10-³ Ω « ★* ________________________________________ ANSWER :- HENCE ; RESISTANCE of wire of RESISTIVITY ( p ) is ; *♣ R = 36 × 10-³ Ω ♥*

Calculate the resistance of a metal wire of length 2m and area of cross section 1.5510to the power -6, if the resistivity of metal be 2.810to the power -8.

Answer»

ANSWER:

RESISTANCE ( R ) = 36 × 10-³ Ω ( ohms)

Explanation:

★ CURRENT ELECTRICITY ★

★ GIVEN ;

» Length of Wire ( L ) = 2 m

» Area of Cross - Section ( A ) = 1.55 × 10^-6 m²

» RESISTIVITY ( p ) = 2.8 × 10^-8

★ RESISTANCE ( R ) = ???

_________________________________________

———— [ BY USING FORMULA ] ————

[ $r \: = \: p \: ( \: \frac{l}{a} \: )$ ]

★ R = 2.8 × 10^-8 × [ 2 / 155 × 10^-8 ]

» R = 2.8 × 10^-8 × [ 2 × 10^8 / 155 ]

» R = [ 2.8 × 2 ] / 155

» R = [ 5.6 ] / 155

» R = 0.036 Ω

★ » RESISTANCE ( R ) = 36 × 10-³ Ω « ★

________________________________________

ANSWER :- HENCE ; RESISTANCE of wire of RESISTIVITY ( p ) is ;

♣ R = 36 × 10-³ Ω ♥

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