Voltage and Resistance Flashcards
1
Q
Energy transferred
A
Charge moved (C) x Voltage (V) (QEV)
2
Q
Voltage
A
Current (A) X Resistance (Ohm) (CVR)
3
Q
What causes electrical transfer of energy?
A
Charge flowing because it works against resistance
4
Q
Is energy transferred completely useful?
A
No, some is but some is dissipated to thermal sources or surroundings
5
Q
What happens to resistors when current flows through them?
A
It heats up. More ions will vibrate making it harder for electrons to get through a resistor, making current decrease.
6
Q
What happens when resistor gets too hot?
A
No current will be able to flow
UNLESS resistance of a thermistor decreases with an increase in temp
