Question

10.which device converts electrical energy into mechanical energy?
a) generator
b) motor
c) transformer
d) battery

1. what is the si unit of magnetic field strength?

a) tesla
b) newton
c) joule
d) weber

1. which law explains electromagnetic induction?

a) coulomb’s law
b) faraday’s law
c) ohm’s law
d) ampere’s law

1. in a series circuit, if one bulb goes out, what happens to the other bulbs?

a) stay lit
b) get brighter
c) go out
d) none of these

1. what is the function of a fuse in an electric circuit?

a) increase voltage
b) protect circuit from overload
c) store charge
d) convert energy

Explanation:

1. A motor uses electrical energy to produce mechanical motion, while a generator does the opposite, a transformer changes voltage levels and a battery stores chemical - electrical energy.
2. The SI unit of magnetic field strength is the Tesla. Newton is for force, Joule for energy and Weber for magnetic flux.
3. Faraday's Law explains electromagnetic induction. Coulomb's Law is about electrostatic force, Ohm's Law is about the relationship between voltage, current and resistance, and Ampere's Law is related to magnetic fields due to electric currents.
4. In a series circuit, the current has only one path. If one bulb goes out (breaks the circuit), the current stops flowing and other bulbs go out.
5. A fuse is a safety device that melts when the current in a circuit exceeds a certain value, protecting the circuit from overload.

Answer:

1. b) Motor
2. a) Tesla
3. b) Faraday’s Law
4. c) Go out
5. b) Protect circuit from overload