EASY
10th CBSE
IMPORTANT
Earn 100

What do you understand by the "resistivity" of a substance?

Important Questions on Electricity

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 14
A wire is 1.0 m long, 0.2 mm in diameter and has a resistance of 10 Ω. Calculate the resistivity of its material.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 15
Write down an expression for the resistance of a metallic wire in terms of the resistivity.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 15
What will be the resistance of a metal wire of length 2 metres and area of cross-section 1.55×10-6 m2, if the resistivity of the metal be 2.8×10-8Ωm?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 16
Give two examples of substances which are good conductors of electricity. Why do you think they are good conductors of electricity?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 16
Calculate the resistance of a copper wire 1.0 km long and 0.50 mm diameter if the resistivity of copper is 1.7×10-8 Ωm.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 17
Will current flow more easily through a thick wire or a thin wire of the same material when connected to the same source? Give a reason for your answer.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 18
How does the resistance of a conductor depend on: length of the conductor?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 18
How does the resistance of a conductor depend on: area of cross-section of the conductor?