Madina Group Mechanical Technician Interview Questions and Answers

Current is the flow of electric charge in a circuit.

• Current is measured in Amperes (A)

• It is the rate of flow of electric charge through a conductor

• There are two types of current - AC (alternating current) and DC (direct current)

• Examples of current include the flow of electrons in a wire when a light bulb is turned on

Voltage is the difference in electric potential between two points in a circuit, measured in volts.

• Voltage is the driving force that pushes electric current through a circuit

• It is measured in volts (V)

• Voltage can be positive or negative, depending on the direction of current flow

• Higher voltage means more potential energy available to move electrons

• Example: A battery provides voltage to power a light bulb

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to the resistance of the conductor.

• Ohm's law is expressed as V = I * R, where V is voltage, I is current, and R is resistance.

• It helps in calculating the current flowing through a circuit when the voltage and resistance are known.

• It can also be used to determine the resista...read more