Physics
A …………… is a device by which resistance in a circuit can be varied continuously.
- key
- switch
- rheostat
- voltmeter
Related Questions
The conventional current is in a direction …………… the direction of motion of electrons.
- parallel
- normal
- opposite
- none of the above
A battery is correctly represented by :
Rheostat is used in a circuit to provide :
- fixed current
- fixed voltage
- fixed resistance
- variable resistance
An instrument used to measure the magnitude of current flowing in a circuit is :
- voltmeter
- galvanometer
- ammeter
- rheostat