EASY
12th ICSE
IMPORTANT
Earn 100

Explain the statement : 'Temperature coefficient of resistance of a metal is 4x10-3per °C'.

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 7

A metallic plug AB is carrying a current I (Fig.). State how the drift velocity of free electrons varies, if at all from the end A to B end.

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EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 8
Define electrical resistivity of a material.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 9
The specific resistance of manganin is 44 x 10-8 Ω-m. Explain this statement.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 10
What is specific conductance? Give its unit and dimensions.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 11
How does the resistivity of a conductor vary with temperature?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 12
If the temperature of a good conductor increases, how does the relaxation time of electrons in the conductor change?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 13
State whether the temperature coefficient of resistance α is positive or negative for Cu.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 13
State whether the temperature coefficient of resistance α is positive or negative for Si.