MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Home
GCSE
Gcse Physics
Electricity - The National Grid
1
2
3
4
5
6
7
8
9
10
Q.1
What is transferred through the National Grid?
0%
Coal
0%
Petrol
0%
Gas
0%
Electricity
Q.2
What voltage is used to transfer electricity through the National Grid?
0%
Up to 300,000 V
0%
Up to 400,000 V
0%
Up to 500,000 V
0%
Up to 600,000 V
Q.3
How is such a high voltage produced?
0%
By using step-up transformers
0%
By using step-down transformers
0%
By using a Darlington pair
0%
None of the above
Q.4
Why is a high voltage used?
0%
It increases the amount of energy wasted in cables
0%
It reduces the amount of energy wasted in cables
0%
The cables cannot transfer low voltage electricity
0%
So they can transfer the electricity at a high current
Q.5
What is the mains voltage in homes in the UK?
0%
120 V
0%
170 V
0%
230 V
0%
270 V
Q.6
How is voltage from the National Grid changed into 230 V for home use?
0%
Step-up transformer
0%
A thin cable
0%
A thick cable
0%
Step-down transformer
Q.7
Electricity is sent through the National Grid using which type of electrical current?
0%
Alternating current
0%
Direct current
0%
Alternating and direct current
0%
Neither alternating nor direct current
Q.8
What voltage is produced in power stations?
0%
15,000 V
0%
20,000 V
0%
25,000 V
0%
30,000 V
Q.9
Why don't birds get electrocuted when they stand on pylon wires?
0%
They do get electrocuted
0%
As they are not connected to any grounded point, the electricity will not flow through the bird and will continue through the cables
0%
Birds do not conduct electricity
0%
None of the above
Q.10
Why does reducing the current and increasing the voltage mean less energy is lost?
0%
A high voltage means they can transfer the electricity at a high current, transferring it at a high current means fewer electrons travelling through the cables which reduces the amount of collisions between electrons and the cables, thus wasting less energy as heat
0%
A high voltage means they can transfer the electricity at a low current, transferring it at a low current means fewer electrons travelling through the cables which reduces the amount of collisions between electrons and the cables, thus wasting less energy as heat
0%
A high voltage means they can transfer the electricity at a low current, transferring it at a low current means more electrons travelling through the cables which reduces the amount of collisions between electrons and the cables, thus wasting less energy as heat
0%
A high voltage means they can transfer the electricity at a low current, transferring it at a low current means fewer electrons travelling through the cables which increases the amount of collisions between electrons and the cables, thus wasting less energy as heat
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page