EASY
12th CBSE
IMPORTANT
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 How does one explain increase in resistivity of a metal with increase of temperature ?

Important Questions on Current Electricity

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 28
Define the term mobility of charge carriers in a conductor. Write its SI unit.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 29
Plot a graph showing variation of resistivity of a conductor (copper) with temperature.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 30
Plot a graph showing variation of current versus voltage for the material Gas.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 31
Sketch a graph showing variation of resistivity of carbon with temperature.
Or
Show on a graph, the variation of resistivity with temperature for a typical semiconductor Si.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 32
Name two materials whose resistivity decreases with the rise of temperature.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 33
How does the conductance of a semi-conducting material change with rise in temperature ?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 34
Of copper and nichrome, which one has possibly larger value of temperature coefficient of resistance ?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 35
How does resistivity of alloy manganin change with temperature ?