The resistivity of gold is 2.44 x 10-8 ohms. m at room temperature. a gold wire that is 0.9 mm in diameter and 14 cm long carries a current of 940 ma. what is the electric field in the wire?
answer

0.090 v/m

0.028 v/m

0.046 v/m

0.0090 v/m

0.036 v/m

The electric field in the gold wire is 0.036V/m.

Hence, Option E) 0.036V/m is the correct answer.

Given the data in the question;

Electric field in the wire;

First we find the cross-sectional area of the gold wire;

Area;

We substitute in our values

Next, we calculate the current density( J ), which is the ratio of Current to Area

Current density( J ) = Current  / Area

We substitute our values into the equation

Now, We know that, using the expression for electric field (E) inside a current conductor:

Where E is electric field, is the resistivity of gold and the current density.

We substitute our values into the equation

The electric field in the gold wire is 0.036V/m.

Hence, Option E) 0.036V/m is the correct answer.

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E=0.036 V/m

Explanation:

Given that

Resistivity ,ρ=2.44 x 10⁻⁸ ohms.m

d= 0.9 mm

L= 14 cm

I = 940 m A = 0.94 A

We know that electric field E

E= V/L

V= I R

R=ρL/A

So we can say that

E= ρI/A

Now by putting the values

E=0.036 V/m

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y