Electricity and the National Grid

Question 1

What are the two ways electrical energy can be moved around?

Answer 1

1. Via overhead powerlines
2. Via underground cables

Question 2

Name 4 advantages of overhead cables compared to underground cables

Answer 2

1. Lower setup cost
2. East to access and fix faults
3. Easy to set up
4. Minimal disturbance to land

Question 3

Name 4 disadvantages of overhead cables compared to underground cables

Answer 3

1. High maintenance
2. Ugly
3. Affected by weather
4. Less reliable

Question 4

Name 4 advantages of underground cables compared to overhead cables

Answer 4

1. Minimal maintenance required
2. Hidden - not an eyesore
3. Not affected by weather
4. More reliable

Question 5

Name 4 disadvantages of underground cables compared to overhead cables

Answer 5

1. Higher setup cost
2. Hard to acces and fix faults
3. Hard to set up
4. Lots o disturbance to land

Question 6

Our demand for energy is ____, and the National Grid has to ____ ____ with this

Answer 6

Our demand for energy is increasing, and the National Grid has to keep up with this

Question 7

In order to meet energy demands in the future, what will need to happen?

(2 options)

Answer 7

1. Energy supplied to the National Grid will have to increase

or

2. Consumer energy demands must decrease

Question 8

What two ways can we increase supply of energy in the future?

Answer 8

1. By opening more power stations
2. Increasing the power output of power stations

Question 9

What two ways can demand for energy be reduced?

Answer 9

1. By consumers using more energy-efficient appliances
2. Being more careful not to waste energy in the home