Generating Electricity

Question 1

nuclear energy produces about _____ times the energy released by fossil fuel (kg for kg)

Accepted Answer

10 000

Question 2

which is not a biofuel

Accepted Answer

coal

Question 3

why is nuclear fuel non-renewable?

Accepted Answer

uranium deposits on earth is finite

Question 4

a step up transformer raises the __ so less current is needed to transfer the same amount of __

Accepted Answer

voltage, power

Question 5

why is tidal power more reliable than wind energy?

Accepted Answer

we have two tides every day

Question 6

transmitting at high voltages...

Accepted Answer

reduces power loss so is more efficient

Question 7

supply and demand: which type of power station takes longest to start up?

Accepted Answer

nuclear

Question 8

nuclear power stations use the process of

Accepted Answer

nuclear fission

Question 9

which generates electricity?

Accepted Answer

solar cells

Question 10

definition of renewable:

Accepted Answer

energy sources that can be replaced and quickly replenished

Question 11

in a power station steam drives a...

Accepted Answer

turbine that turns a generator to produce electricty

Question 12

which statement is correct?

Accepted Answer

Energy can only be transferred from one form to another.

Question 13

A 10m2 solar panel generates 400W, how many cells are in the panel if each cell generates 0.2W?

Accepted Answer

2000

Question 14

power stations produce electricity at a voltage...

Accepted Answer

< national grid so step up transformers are needed

Question 15

does nuclear energy produce greenhouse gases?

Accepted Answer

no

Question 16

where would you build a geothermal power station?

Accepted Answer

near a volcano

Question 17

the national grid voltage is

Accepted Answer

132 000V or more

Question 18

energy losses due to heat loss are reduced in the national grid because..

Accepted Answer

the current is lowered

Question 19

we can use electricty to rump water uphill when electricity demand is...

Accepted Answer

low, to realease later when demand is high

Question 20

The electricity goes to the ______ to produce the correct voltage.

Accepted Answer

transformers

Question 21

which of the following is NOT a disadvantage of solar cells?

Accepted Answer

cost nothing to run

Question 22

which gasproduced when burning fossil fuels contributes towards acid rain?

Accepted Answer

sulphur dioxide

Question 23

in a power station steam drives a...

Accepted Answer

turbine that turns a generator to produce electricty

Question 24

gas fired power stations have..

Accepted Answer

the fastest to start up time

Question 25

where does the energy for hydroelectricity come from?

Accepted Answer

kinetic energy

Question 26

energy from wind and water is carbon-free

Accepted Answer

true

Question 27

Therefore, generators are turned _____ by fossil or nuclear fuels.

Accepted Answer

indirectly

Question 28

which is NOT a reason that electricity demands vary?

Accepted Answer

if liverpool lost to everton

Generating Electricity

Questions 28

Generating Electricity

Questions 28