P2 - Electricity Flashcards
What is the unit of electric current?
Ampere (A)
True or False: Voltage is the measure of the potential difference in electric charge.
True
Fill in the blank: The flow of electric charge is called __________.
current
What is the formula for calculating electrical power?
Power (P) = Potential Difference (V) × Current (I)
What is resistance measured in?
Ohms (Ω)
True or False: A circuit with no resistance is called a superconductor.
True
What is the symbol for voltage?
V
What does a voltmeter measure?
Potential Difference
Multiple Choice: What is the effect of increasing resistance in a circuit?
It decreases the current.
Define the term ‘conductor’.
A material that allows electric charge to flow easily.
What is an insulator?
A material that does not allow electric charge to flow easily.
Fill in the blank: The total energy transferred in a circuit is measured in __________.
Joules (J)
What is the purpose of a fuse in an electrical circuit?
To protect the circuit from excessive current.
True or False: A series circuit has more than one path for current to flow.
False
What is the effect of connecting resistors in series?
The total resistance increases.
What is the SI unit of energy?
Joule (J)
Define ‘Ohm’s Law’.
The current through a conductor between two points is directly proportional to the voltage across the two points.
What does a resistor do in a circuit?
It limits the flow of electric current.
Multiple Choice: Which of the following components stores electrical energy?
Capacitor
What is the relationship between voltage, current, and resistance called?
Ohm’s Law
Fill in the blank: The power rating of an appliance is measured in __________.
Watts (W)
True or False: Direct current (DC) flows in one direction only.
True
What is alternating current (AC)?
An electric current that reverses direction periodically.
What does the term ‘circuit breaker’ refer to?
A device that interrupts the flow of current in an electric circuit.
What is the function of a diode in a circuit?
It allows current to flow in one direction only.
Fill in the blank: The energy transferred per unit charge is known as __________.
Potential Difference
What happens to the total current in a parallel circuit?
The total current is the sum of the currents through each branch.
