Basic electronics

A diode allows current to flow:

• 1 In both directions
• 2 In one direction only
• 3 In neither direction
• 4 Only when hot

Converting alternating current to direct current is called:

• 1 Oscillation
• 2 Rectification
• 3 Modulation
• 4 Amplification

An AND gate gives output 1 only when:

• 1 Both inputs are 1
• 2 Any input is 1
• 3 Both inputs are 0
• 4 The inputs differ

An OR gate gives output 0 only when:

• 1 Both inputs are 0
• 2 Both inputs are 1
• 3 The inputs differ
• 4 One input is 1

A NOT gate:

• 1 Adds two inputs
• 2 Has two outputs
• 3 Stores data
• 4 Inverts its input

A device that has two terminals and allows current in one direction is a:

• 1 Transistor
• 2 Diode
• 3 Resistor
• 4 Capacitor

An LED gives out:

• 1 Sound
• 2 Radio waves
• 3 Heat only
• 4 Light when current flows

The output of an OR gate with inputs 1 and 0 is:

• 1 2
• 2 1
• 3 0
• 4 Undefined

A transistor is mainly used as a:

• 1 Battery
• 2 Magnet
• 3 Switch or amplifier
• 4 Lens