Electrical Energy

Question 1

What is the current like in a series circuit?

Answer 1

It is the same the whole way around

Question 2

What is the current like in a parallel circuit?

Answer 2

The currents in the branches of the circuit add up to the supply current

Question 3

What do the potential differences around a series circuit add up to?

Answer 3

The potential difference of the supply

Question 4

What is the total resistance in a series circuit?

Answer 4

The sum of all the individual resistors

Question 5

What does adding another resistor do to a series circuit?

Answer 5

It increases the overall resistance

Question 6

When resistors are connected in a parallel circuit what is their potential difference?

Answer 6

They have the same potential difference across them

Question 7

What is the total resistance value in a parallel circuit?

Answer 7

It will always be less than the smallest individual resistor

Question 8

What would adding a resistor to a parallel circuit do?

Answer 8

It would decrease the total resistance because you are providing an alternative path for electric charge.

Question 9

What is the current through a resistor in a parallel circuit?

Answer 9

Ohm’s Law - I = V/R

Question 10

What is the current?

Answer 10

The number of electrons through a wire per second

Question 11

What is current measured in?

Answer 11

Amps

Question 12

What is voltage?

Answer 12

The amount of pressure pushing electrons through a wire

Question 13

What is voltage measured in?

Answer 13

Volts

Question 14

What is power?

Answer 14

The rate of work done by the electricity

Question 15

What is power measured in?

Answer 15

Watts

Question 16

What does a resistor do?

Answer 16

Reduces the current and are like friction

Question 17

What is the current like in a series circuit?

Answer 17

The same the whole way around

Question 18

What is the voltage like in a series circuit?

Answer 18

It splits up but all adds up to the total power source

Question 19

What is the current like in a parallel circuit?

Answer 19

It splits up, divides and then recombines

Question 20

What is the voltage like in a parallel circuit?

Answer 20

The same the whole way around

Question 21

What does a diode do?

Answer 21

It allows the electricity it only goes through it one way

Question 22

What is the negative side on an LED like?

Answer 22

Flat side and has a short wire

Question 23

How does the resistance change in an LDR?

Answer 23

When it is bright there is low resistance
When it is dark there is high resistance

Question 24

What is an LED

Answer 24

Light Emitting Diode- very efficient energy source

Question 25

What is the equation for resistance?

Answer 25

R=V/C

Question 26

What is resistance measured in?

Answer 26

Ohms

Question 27

What does having more bulbs in a series do to the resistance?

Answer 27

Increases it

Question 28

What does having more bulbs in parallel to do the resistance?

Answer 28

Decreases the resistance

Question 29

What is non-renewable energy?

Answer 29

An energy source that will eventually run out

Question 30

What is renewable energy?

Answer 30

Energy that will not run out

Question 31

What is coal formed from?

Answer 31

Dead plants

Question 32

What is oil made from?

Answer 32

Dead plankton

Question 33

What gas is natural gas mainly made up of?

Answer 33

Methane gas

Question 34

What happens in a steam turbine system?

Answer 34

Heat turns water into steam, steam turns turbine, turbine spins generator