NJCTL APEM Circuits 1-18

Front

What is a circuit in electrical engineering?

Back

A circuit is a closed loop that allows electric current to flow, consisting of a power source, conductors, and load.

Front

Define Ohm's Law.

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). Formula: V = I * R.

Front

What is the difference between series and parallel circuits?

Back

In a series circuit, components are connected end-to-end, so the same current flows through all components. In a parallel circuit, components are connected across common points, so the voltage across each component is the same.

Front

What is the role of a resistor in a circuit?

Back

A resistor limits the flow of electric current in a circuit, providing resistance and controlling voltage levels.

Front

Explain the concept of voltage.

Back

Voltage is the electric potential difference between two points in a circuit, measured in volts (V). It represents the energy per unit charge available to move electrons.

Front

What is a capacitor and its function in a circuit?

Back

A capacitor is a device that stores electrical energy in an electric field, used to smooth out voltage fluctuations and provide energy storage.

Front

Define the term 'current' in the context of electrical circuits.

Back

Current is the flow of electric charge in a circuit, measured in amperes (A). It represents the rate at which charge is flowing.

Front

What is the purpose of a fuse in an electrical circuit?

Back

A fuse is a safety device that protects a circuit by breaking the connection if the current exceeds a certain level, preventing overheating and potential fires.

Front

Explain the concept of power in electrical circuits.

Back

Power is the rate at which electrical energy is transferred by an electric circuit, measured in watts (W). Formula: P = V * I.

Front

What is the function of a diode in a circuit?

Back

A diode allows current to flow in one direction only, acting as a one-way valve for electric current.