A 1.35 V potential difference is maintained across a 1.1 m length of tungsten wire that has a cross-sectional area of 0.72 mm2 . What is the current in the wire? The resistivity of the tungsten is 5.6 × 10−8 Ω · m . Answer in units of A.

Therefore,

The current in the wire is 15.77 Ampere.

Explanation:

Given:

Length = l = 1.1 meter

V = 1.35 Volt

To Find:

Current, I =?

Solution:

Resistance for 1.1-m long tungsten wire with a cross sectional area, if it is connected across a 1.35 V potential difference given as

Where,

R = Resistance

l = length

A = Area of cross section

Substituting the values we get

Now by Ohm's Law,

Substituting the values we get

Therefore,

The current in the wire is 15.77 Ampere.

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