Which of the following is used as a safety device in an electrical circuit?
a) Circuit breaker
b) Key
c) Battery
d) Ammeter
Overloading in high current drainage, can be well prevented by using: NTS PST(2016/2017)
a) electric battery
b) electric cell
c) fuse
d) switch
e) circuit breaker
Which is the best material for making an electromagnet?
a) Rubber
b) Glass
c) Iron
d) Plastic
Electricity is a form of;
a) Energy
b) Waves
c) Work done
d) Speed
Electricity can be changed into;
a) Heat
b) Light
c) Sound
d) All of these
The flow of electrons in a wire is called;
NTS PST–P-2----(date not confirm)
a) Voltage
b) Current
c) Potential
d) Power
