Resistance Flashcards
(4 cards)
1
Q
How would an observer know that a Wheatstone bridge is balanced?
A
no current flowing through
galvanometer
2
Q
Electricity generating companies transmit electricity over large distances at high voltage. Explain why
high voltage is used.
A
High voltage uses low current
minimising power (heat) loss
3
Q
Apart from measuring resistance, state one other practical use of a Wheatstone
bridge.
A
Temperature control/ fail safe device.
4
Q
Thermistor
A
A thermistor is a semiconductor device whose resistance decreases rapidly with increasing temperature.
