Electricity Flashcards
1
Q
Explain what is meant by electromotive force of 1.5V
A
1.5J of electrical energy supplied in driving charge around circuit
energy per unit charge
2
Q
Person is using defibrillator, which has two contacts. Explain how one contact becomes hegative and other becomes positive [2]
A
electrons move from one contact to another
negative contact gains electrons and positive contact loses electrons
3
Q
Suggest why handles of defibrillator made from insulator [2]
A
no charge flows in doctor
which might injure
4
Q
Circuit with battery, resistor. State energy changes [2]
A
chemical to heat
chemical to heat as a result of electrical working
