electonics

Question 1

Diode

Answer 1

Is a component that will allow current to flow in one direction only

Question 2

Forward biased

Answer 2

If the positive end of a battery is connected to the positive end of a diode the diode is said to be forward biased and current can flow

Question 3

reverse biased

Answer 3

If the positive end of the battery is connected to the negative end of diode it is said to be reverse biased and no electricity can flow

Question 4

a diode can be used to change alternating current into direct current

Answer 4

to change alternating current into direct current

Question 5

Electronic devices such as radios, tape recorders, and calculations

Answer 5

Need low voltage direct current

Question 6

Light emitting diodes (LED)

Answer 6

Is a diode that gives out light when a current flows through it

Question 7

Current will only flow when LED is

Answer 7

Forward biased

Question 8

LED’s use only tiny currents so

Answer 8

A resistor must be connected in series with it

Question 9

LED’s are useful as they are

Answer 9

Cheap, reliable and long lasting and use far less current than other light bulbs

Question 10

a light dependent resistor (LDR)

Answer 10

Is a resistor whose resistance depends on light

Question 11

When light falls on an LDR

Answer 11

It’s resistance decreases this low resistance will allow a current through the circuit

Question 12

Electronics

Answer 12

Is the careful and exact control of tiny amounts of electric current