EASY
12th ICSE
IMPORTANT
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What are the factors on which the resistance of a conductor depends? Write the relation.

Important Questions on Electric Resistance and Ohm's Law

EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 14
The specific resistance depends upon which properties of a conductor; length, cross-sectional area, material, resistance?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 15
A wire of resistivity ρ is stretched uniformly so that its length becomes four times. What is its new resistivity? (Assume temperature of the wire remains constant during stretching of the wire). 
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 16
Name two physical conditions on which the resistivity of a metal depends.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 17
Write the dimensions of specific resistance.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 18
Specific resistances of copper, silver and constantan are 1.18 × 10-6 Ω-cm, 1.0 × 10-6 Ω-cm and 48 × 10-6 Ω-cm respectively. Which one is best electrical conductor and why?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 19
Define temperature coefficient of resistance of the material of a conductor.  
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 20
Out of metals and metal alloys, which has greater temperature coefficient of resistance?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 21
Whether pure germanium at absolute zero temperature is a good conductor or a semiconductor or an insulator of electricity.