12. Series and Paralell circuits

Question 1

in a series circuit there is ____ possible _ for an electron to ___

Answer 1

there is only one path

Question 2

in a paralell circuit

the electrons can…

Answer 2

take different paths around the circuit

Question 3

why is a paralell circuit used for normal room lights?

Answer 3

so they can be switched on and off independently

Question 4

if one bulb blows in a paralell circuit…

Answer 4

• the other bulbs will still work
• whereas in a series they would all go out

Question 5

it is possible to turn on individual bulbs in a _ circuit

Answer 5

paralell

Question 6

What are the rules in a series circuit?

Answer 6

• current is the same throughout circuit
• potential difference is shared between components (bulbs will get dimmer the more you add)
• total resistance = adding resistances of individ components

Question 7

what are the rules for a paralell circuit?

Answer 7

• potential difference is same throughout circuit
• current splits at each junction (more current flows through the branch with smaller resistor)
• use v=ir to calculate current

Question 8

what happens when more components are added to a paralell circuit?

Answer 8

• increases current
• resistance of circuit decreases

Question 9

what is alternating current?

Answer 9

• electrons continually change direction
• mains electricity is ac

Question 10

what type of current is battery?

Answer 10

dc (direct, electrons flow in same direction)