Question

Can Anyone please give me some Numericals For Practice of Ch Electricity and Light of class 10?

Answer 1

Answer:

Question 1

A wire of length 3 m and area of cross-section 1.7 × 10-6 m2 has a resistance 3 × 10-2 ohm.

a. What is the formula for resistivity of the wire and what is the unit of it

b. Calculate the resistivity of the wire

Question 2

The table given below shows the resistivity of three Material X, Y and Z?

Samples

X

Y

Z

Resistivity

3 X 10-9

11.1 X 0-6

18X10-17

a. Arrange the samples in increasing order of conductivity

b. Which of these is best conductor?

c. Which are these is best insulator?

Explanation:

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