^Electric cell
Electric cell It neither creates nor destroys charge, whereas it just maintains the potential difference & organized flow of charge […]
Entries by kp-web-admin
^Parallel combination of resistors
Parallel combination of resistors The voltage is same across each circuit element is same but current is different & is […]
^Series combination of resistors
Series combination of resistors The current across each circuit element is same, but potential difference is different & proportional to […]
^Zero α for Nichrome, constantan & Manganin
Zero α for Nichrome, constantan & Manganin i.e. there is appreciably no change (or very slight change) in R with temperature. […]
^- ve α for electrolytes
– ve α for electrolytes Cause of decrease in R with increase in temp. for electrolytes is decrease in viscosity.
^- ve α for semiconductors
– ve α for semiconductors On heating semiconductors the number density of free electrons increases & τ decreases. But the […]
^Error in exponential form
^Error in exponential form Differentiating both sides we can write The maximum value of fractional error will be
^+ ve α for metals & alloys
+ ve α for metals & alloys With the increase in temperature of metals & alloys thermal agitation increases & […]
^Temperature variation of resistance
Temperature variation of resistance On heating a material its resistivity changes, which changes the electrical resistance of the material. The […]
^Resistance of a wire on stretching
Resistance of a wire on stretching (a) increases n2 times original resistance if length is increased n times. (b) decreases […]
