What is electricity?
Electricity is the flow of electric charge, primarily through conductors.
True or False: Electricity can exist without a circuit.
False
What is the unit of electric current?
Ampere (A)
Fill in the blank: Voltage is measured in ______.
Volts
What is Ohm’s Law?
Ohm’s Law states that V = I * R, where V is voltage, I is current, and R is resistance.
Which material is usually a good conductor of electricity?
Copper
What is the difference between AC and DC?
AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction.
True or False: Resistance is the opposition to the flow of electric current.
True
What is the SI unit of resistance?
Ohm (Ω)
Fill in the blank: A closed loop through which electricity flows is called a ______.
Circuit
What does a capacitor do?
A capacitor stores electrical energy in an electric field.
What is the purpose of a fuse in an electrical circuit?
A fuse protects the circuit by breaking the connection if the current exceeds a certain level.
True or False: Voltage can exist even when no current is flowing.
True
What is the primary function of a transformer?
A transformer changes the voltage level in an AC circuit.
What is the formula to calculate electrical power?
Power (P) = Voltage (V) × Current (I)
Fill in the blank: The flow of electric charge is called ______.
Current
What is a circuit breaker?
A circuit breaker is an automatic switch that stops the flow of current in case of overload or short circuit.
What type of current is typically used in homes?
Alternating Current (AC)
True or False: Insulators allow electric current to flow freely.
False
What is the role of an inductor in a circuit?
An inductor stores energy in a magnetic field when electric current flows through it.
What does the term ‘grounding’ refer to in electrical systems?
Grounding refers to the process of transferring electricity directly to the earth to prevent electric shock.
What is the primary advantage of using a three-phase power system?
A three-phase power system provides a more constant and reliable power supply.
Fill in the blank: The rate at which electrical energy is consumed is called ______.
Power
What is an electrical circuit?
An electrical circuit is a closed path that allows electric current to flow.
