TRANSFORMERS AND NATIONAL GRIDS
2 marks · EasyDescribe what would happen if the National Grid did not use transformers.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
If transformers were not used, electricity would be transmitted at low voltage and high current, causing large energy losses as heat, making transmission inefficient and unsafe for use in homes and businesses.
Also accept: There would be much more energy lost as heat and transmission would not be efficient
Common mistakes: It would be safer without transformers
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Explains that there would be large energy losses/inefficiency.
B2 · 1 mark · Explains that electricity would not be safe or suitable for home/business use.
Worked solution
Without transformers, electricity would need to be sent at low voltage which means high current. This would cause much more energy to be lost as heat in the wires, making transmission very inefficient. It also would not be safe for use in homes as voltage would not be at a suitable level.