12th Class Physics MCQS
The unit of conductivity is:
Ohm m-1
Ohm m-1
Both a and b
Ohm-3m-1
Electric power:
V2x1
V/1
Vx1
V/12
Terminal potential difference is greater than emf of the cell when
None of these
Circuit is open
small battery is charged by bigger battery
Circuit is closed
The vessel containing the tow electrodes and liquid to known as.
Volt cell
Volta meter
Volta cell
Chemical cell
When a pot difference of 4 volt is applied across resistance, 10 J of energy is converted Find charge flows
10.0 C
5.0 C
0.20 C
2.5 C
Heat energy is converted into electrical energy.
Solar cells
None of above
thermocouples
Electric generators
A wire uniform cross-section. A length L and resistance R is cut into two equal parts. The resistivity of each part will be:
Remain the same
One fourth
Halved
Doubled
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