EASY
10th CBSE
IMPORTANT
Earn 100

How does the resistance of a wire change when: its material is changed to one whose resistivity is three times?

Important Questions on Electricity

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 23
Calculate the area of cross-section of a wire if its length is 1.0 m, its resistance is 23 Ω, and the resistivity of the material of the wire is 1.84×10-6 Ωm.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Long Answer Type Questions>Q 24
Define resistivity. Write an expression for the resistivity of a substance. Give the meaning of each symbol which occurs in it.
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: