EASY
12th CBSE
IMPORTANT
Earn 100
Define temperature coefficient of resistivity.
Important Questions on Current Electricity
EASY
12th CBSE
IMPORTANT
How does the random motion of free electrons in a conductor get affected when a potential difference is applied across its ends ?
EASY
12th CBSE
IMPORTANT
Define the term 'drift velocity' of charge carriers in a conductor and write its relationship with the current flowing through it.
EASY
12th CBSE
IMPORTANT
Write the expression for the drift velocity of charge carriers in a conductor of length across which a potential difference is applied.
EASY
12th CBSE
IMPORTANT
How does one explain increase in resistivity of a metal with increase of temperature ?
EASY
12th CBSE
IMPORTANT
Define the term mobility of charge carriers in a conductor. Write its SI unit.
EASY
12th CBSE
IMPORTANT
Plot a graph showing variation of resistivity of a conductor (copper) with temperature.
EASY
12th CBSE
IMPORTANT
Plot a graph showing variation of current versus voltage for the material Gas.
EASY
12th CBSE
IMPORTANT
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.
