what will be the resistance of a metal wire of length 2m. and area of cross section 1.55 *10^-6m sqr,, if the resistivity of the metal be 2.8 *10^-8ohm m.........

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Hlloo.....what is the waste material of a plant ? oxygen water and carbon dioxide r by products .

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i don't know this answer

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R=pl/a

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@Shahid_Ali Waste material of a plant are generally Oxygen and extra water during photosynthesis and Carbon die oxide during respiration ( in night )...

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Calculation of Resistance

Resistance is a property of a material that hinders the flow of electric current through it. It is determined by the resistivity of the material, which is a measure of how strongly it resists the flow of electric current. In this case, we are given the resistivity of the metal wire as 2.8 x 10^-8 ohm m, the length of the wire as 2m, and the area of cross-section as 1.55 x 10^-6 m^2. From these values, we can calculate the resistance of the wire using the formula:

Resistance = (Resistivity x Length) / Area

Now, let's break down the calculation step by step:

Step 1: Convert the given resistivity to the standard unit of ohm meter (Ω·m).
Given resistivity = 2.8 x 10^-8 ohm m

Step 2: Substitute the values into the formula:
Resistance = (2.8 x 10^-8 Ω·m x 2m) / (1.55 x 10^-6 m^2)

Step 3: Simplify the expression:
Resistance = (5.6 x 10^-8 Ω·m) / (1.55 x 10^-6 m^2)

Step 4: Divide the numerator and denominator by the common factor of 10^-8:
Resistance = (5.6 / 1.55) x (10^-8 / 10^-6) Ω

Step 5: Convert the result to scientific notation:
Resistance = 3.61 x 10^-2 Ω

Step 6: Round the resistance to an appropriate number of significant figures:
Resistance = 0.036 Ω

Therefore, the resistance of the metal wire is approximately 0.036 Ω.

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Similar Class 10 Doubts

What will be the resistance of a metal wire of length 2metres and area of cross section 1.55*10^-6m^2 if the resistivity of the metal be 2.8*10^-8ohm m?

A copper wire has cross sectional area 4×10^-6m^2 and resistivity 1.6×10^-8ohm m. Calculate the length of the wire to make its resistance 10 ohm. By how much does the resistance change if the diameter is double?

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The resistance of a conductor is 1.50 ohms and its length is 80cm & cross section area is 0.025 cm^2. Calculate its Resistivity. ( Length should be in metre and cross section area also in meter) Response quickly.?

Top Courses for Class 10View all

Science Class 10

Social Studies (SST) Class 10

Mathematics (Maths) Class 10

English Grammar Advanced

English Grammar Basic

Top Courses for Class 10

Top Courses for Class 10

Suggested Free Tests

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What will be the resistance of a metal wire of length 2metres and area of cross section 1.5510^-6m^2 if the resistivity of the metal be 2.810^-8ohm m?