Electricity Basics

What is the unit of electric current?

• Coulomb

• Volt

• Ampere (A)

• Ohm

What is the SI unit of electric charge?

• Joule

• Ampere

• Coulomb

• Ohm

What is the formula to calculate electrical power?

• Power (P) = V - I

• Power (P) = V + I

• Power (P) = V / I

• Power (P) = V x I

What is the resistance of a circuit with a current of 2A and voltage of 6V?

• 3 ohms

• 5 ohms

• 4 ohms

• 2.5 ohms

What is Ohm's Law?

• Ohm's Law is V = I * R, where V is the voltage, I is the current, and R is the resistance.

• Ohm's Law is E = mc^2, where E is energy, m is mass, and c is the speed of light.

• Ohm's Law is P = V * I, where P is the power, V is the voltage, and I is the current.

• Ohm's Law is F = m * a, where F is the force, m is the mass, and a is the acceleration.

What is the function of a circuit breaker?

• The function of a circuit breaker is to protect an electrical circuit from damage by interrupting the flow of electricity when a fault or overload is detected.

• The function of a circuit breaker is to increase the flow of electricity in a circuit

• Circuit breakers are used to generate electricity in a circuit

• A circuit breaker's purpose is to regulate the temperature of an electrical circuit

What is the difference between AC and DC?

• AC and DC both periodically change direction.

• AC periodically changes direction, while DC flows in one direction constantly.

• AC and DC both flow in one direction constantly.

• AC flows in one direction constantly, while DC periodically changes direction.

How does a capacitor store energy?

• A capacitor stores energy by converting it into heat

• A capacitor stores energy by emitting light

• A capacitor stores energy by generating sound waves

• A capacitor stores energy by accumulating and holding electric charge on its plates.

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

• To regulate the current flow in an electrical circuit.

• To change the voltage level in an electrical circuit.

• To store energy in an electrical circuit.

• To generate heat in an electrical circuit.

Explain the concept of electric circuits.

• Electric circuits are paths for water flow, consisting of pipes, pumps, and tanks.

• Electric circuits are paths for light flow, consisting of bulbs, lamps, and switches.

• Electric circuits are paths along which electrons can flow, consisting of components like wires, resistors, capacitors, and batteries connected in a closed loop. When a voltage source is connected, it creates a potential difference driving electron flow, known as current, following Ohm's Law.

• Electric circuits are paths for air flow, consisting of fans, ducts, and vents.