Electrical Circuits

Question 1

What is conventional current?

Answer 1

Is the direction of current from positive to negative

Question 2

How many electrical paths are there?

Answer 2

One

Question 3

What is a series circuit?

Answer 3

When the positive pole of one cell touches the negative pole of another cell it is connected in series

Question 4

What happen when a resistor is added?

Answer 4

Total current in the circuit decreases

Question 5

What happen if there is more cells in a circuit?

Answer 5

The stronger the current the brighter the bulb

Question 6

What is a Parallel circuit?

Answer 6

• The circuit branches and the current divides
• The total of current not flowing through every bulb
• more than one electrical path

Question 7

What happen if you connect a LED in a certain way?

Answer 7

It conducts electricity and emit red, green and yellow light

Question 8

What do LED’s do these days

Answer 8

Also emites ultra violet and infrared light

Question 9

What is a photocell

Answer 9

Also a LED but operates in reverse

Question 10

What does the photocell do?

Answer 10

It absorbs light, the absorbed light energy causes an electrical current

Question 11

What happens if it is connected to an external appliance

Answer 11

it supplies electrical energy

Question 12

How does alternating current (Doorbell) work

Answer 12

• has electromagnet that vibrates a 60H2 The copper turning around the soft iron core forms and electron which is connected to the alternating current supply of a house
• As soon as the current changes direction, the magnet attracts and repels the metal connector which causes the buzzing sound

Question 13

What is a direct current?

Answer 13

• A doorbell that makes ding dong
• The copper turning around the soft iron core from an electromagnet and are attached to the battery. If the switch is pushed, it switches the current on and off
• The metal knocker is then attached by the electro for a moment, which breaks the circuit causing the distinctive bell sound