OHM'S LAW BASICS
What does the formula V = I × R represent?
Ohm's Law?
What type of current flows in one direction only?
Direct Current (DC)
In which type of circuit is there only one path for current?
Series Circuit
What creates a magnetic field around a wire?
Moving electric charge (current)
What device automatically breaks the circuit if too much current flows?
Circuit breaker or fuse
What unit is resistance measured in?
Ohms (Ω)?
Which current type is used in household outlets?
Alternating Current (AC)
In a parallel circuit, if one component fails, what happens to the others?
They keep working
What device uses motion to generate electricity using magnets?
Generator
Why should you never touch electrical appliances with wet hands?
Water conducts electricity, causing shock
If voltage increases and resistance stays the same, what happens to current?
It increases
Which current shows a sine wave on a graph?
Alternating Current (AC)
Which circuit gives each branch the full voltage from the source?
Parallel Circuit
What is an electromagnet?
A coil of wire that acts like a magnet when current flows through it
What household material is used to insulate wires and prevent shock?
Plastic or rubber
What is the "push" that drives electric charges through a circuit called?
Voltage
What is a typical source of DC power?
Batteries
What happens to current in a series circuit with multiple components?
It stays the same through all components
Changing magnetic fields can create what in a nearby wire?
Electric current (induced current)
Why are parallel circuits used in home wiring instead of series circuits?
So that if one device fails, others still work
If current = 2 A and resistance = 4 Ω, what is the voltage?
8 volts (V = I × R → 2 × 4 = 8)
How does alternating current change direction?
It switches direction regularly
Give an example of a series circuit in real life.
Old Christmas lights
What’s one real-life application of electromagnetic induction?
Transformers or electric generators
Name one real-world device that uses electromagnetism to function.
Doorbell, speaker, MRI machine, motor