EASY
10th CBSE
IMPORTANT
Earn 100

A wire of resistance 10 Ω is bent in the form of a closed circle. What is the effective resistance between the two points at the ends of any diameter of the circle?

Important Questions on Electricity

EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 3 - Electricity>EXERCISE - 3B>Q 6
Should the heating element of an electric iron be made of iron, silver or nichrome wire?
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 3 - Electricity>EXERCISE - 3B>Q 7
Define the term "resistivity" of a material.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 3 - Electricity>EXERCISE - 3B>Q 8
Calculate the resistance of a conductor, if the current flowing through it is 0.2 A when the applied potential difference is 0.8 volt.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 3 - Electricity>EXERCISE - 3B>Q 9
A cylinder of material is 10 cm long and has a cross-section of 2 cm2. If its resistance along the length be 20 Ω, what will its resistivity value be in number and units?
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 3 - Electricity>EXERCISE - 3B>Q 10
A wire of uniform area of cross-section is stretched to four times its original length. By what factor does its resistivity change? 
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 3 - Electricity>EXERCISE - 3B>Q 11
If a wire of resistivity (ρ) is stretched to thrice its initial length, what will be its new resistivity?
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 3 - Electricity>EXERCISE - 3B>Q 1
State Ohm's law. Express it mathematically. Define SI unit of resistance.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 3 - Electricity>EXERCISE - 3B>Q 2
A wire is 1.0 m long, 0.2 mm diameter has resistance of 10 Ω. Calculate the resistivity of material.