Electricity (National grid)

What type of transformer increases voltage?

• Step-Up

• Step-Down

What quantities are changed in a step-up transformer?

• Voltage increases

• Voltage decreases

• Current increases

• Current decreases

Why is the voltage increased in the national grid?

• Stops electricity being lost.

• Stops energy loss by heat

• To increase safety

• Stops energy loss through leaking electricity

Which colour is live?

• Yellow and Green

• Blue

• Brown

• None of them

What is the yellow and green wire called?

• Earth

• Live

• Scary

• Neutral

What is mains voltage in the UK?

• 240V

• 1.5V

• 120V

• 230V

Which of these is a symbol for a fuse?

• 
• 
• 
• 

Why is the voltage in the national grid stepped down for peoples houses?

• To make sure electrical devices work.

• To save national grid money.

• To stop energy loss in the home.

• Large voltages are unsafe.

Which images shows the voltage trace for a.c?

• 
• 

Why is the voltage increased in the national grid?

• Stops electricity being lost.

• Stops energy loss by heat

• To increase safety

• Stops energy loss through leaking electricity