Circuits

What component allows current to flow in only one direction?

• Resistor

• Capacitor

• Diode

• Transistor

What happens if you do not use a resistor with an LED?

• The LED will grow brighter

• The LED will not light up

• The LED could burn out from too much current

• The LED will last longer

Where would you use a capacitor?

• To store electrical charge temporarily

• To control the direction of current

• To limit current in LED

• To switch between two circuits

What symbol is this?

If a resistor has a resistance of 4Ω and a current of 2A flows through it, what is the voltage across it?

What are the 3 basic components needed to make a circuit?

• Resistor, transitor, and capacitor

• Battery, motor, and lamp

• Power source, load, and connecting wires

• Switch, diode, and fuse

Converts electrical energy into heat and light

What happens to the current in a series circuit if one components stops working?

• It flows through other paths

• It increases

• It stops

• It becomes zero but starts again after a delay

How does the increasing resistance affect the current in a circuit, assuming the voltage is constant?

• Increases the current

• Decreases the current

• Has no effect on the current

• Doubles the current

What is the formula of Ohm's Law?