EASY
12th ICSE
IMPORTANT
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How does the resistivity of a conductor vary with temperature?

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 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.
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 Ag.
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 Ge.
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 C.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 14
Name one material whose resistivity decreases with rise in temperature. Explain briefly on the basis of free electron theory why resistivity decreases.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 15
Show graphically how electrical resistance of a piece of Silicon or Germanium varies when its temperature is varied.