EASY
10th CBSE
IMPORTANT
Earn 100

Define resistivity. Write an expression for the resistivity of a substance. Give the meaning of each symbol which occurs in it.

Important Questions on Electricity

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Long Answer Type Questions>Q 24
State the SI unit of resistivity.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Long Answer Type Questions>Q 24
Distinguish between resistance and resistivity.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Long Answer Type Questions>Q 24
Name two factors on which the resistivity of a substance depends and two factors on which it does not depend.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Long Answer Type Questions>Q 24
The resistance of a metal wire of length 1 m is 26 Ω at 20°C. If the diameter of the wire is 0.3 mm, what will be the resistivity of the metal at that temperature?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 25
The resistance of a wire of length 300 m and cross-section area 1.0 mm2 made of material of resistivity 1.0×10-7 Ω m is:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 26
When the diameter of a wire is doubled, its resistance becomes:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 27
If the resistance of a certain copper wire is 1 Ω, then the resistance of a similar nichrome wire will be about:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 28
If the diameter of a resistance wire is halved, then its resistance becomes: