31. The device used to step up or step down the voltage in an electrical circuit is called a:
a) Generator
b) Motor
c) Transformer
d) Inductor
32. The primary coil of a transformer has 500 turns and the secondary coil has 1000 turns. If the primary coil is connected to a 10V AC source, the output voltage of the secondary coil will be:
a) 5V
b) 10V
c) 20V
d) 40V
33. The device used to protect electrical circuits from excessive current is called a:
a) Capacitor
b) Resistor
c) Diode
d) Fuse
34. Which of the following is not a property of magnetic materials?
a) Ferromagnetism
b) Paramagnetism
c) Diamagnetism
d) Thermomagnetism
35. Which of the following is not a property of paramagnetic materials?
a) They are weakly attracted to a magnet
b) They become magnetized in the presence of a magnetic field
c) They have a net magnetic moment even in the absence of a magnetic field
d) They lose their magnetism when the external magnetic field is removed
