What is the National Grid?

Where does the National Grid transfer energy from?

Where does the National Grid transfer energy to?

How does doing work in cables transfer energy?

Why do the cables heat up?

How is the National Grid made more efficient?

When the current is high in cables,

What is the problem with transmitting electricity at high current?

What type of transformer is used at the start of the National Grid?

What type of transformer is used before electricity reaches consumers?

Where are step-up transformers in the National Grid?

What do step-up transformers do?

How do step-up transformers work?

What do step-down transformers do?

What is the formula for power in a transformer?

What does V_s stand for in the formula for power in a transformer?

What does I_s stand for in the formula for power in a transformer?

What does V_p stand for in the formula for power in a transformer?

What does I_p stand for in the formula for power in a transformer?

What does V_sI_s stand for in the formula for power in a transformer?

What does V_pI_p stand for in the formula for power in a transformer?

What are the units for power?

What are the units for potential difference?

What are the units for current?

A step-down transformer converts 11,500 V into 230 V. The power output is 2,000 W, so what is the current flowing in the primary coil?

A step-down transformer converts 11,500 V into 230 V. The power output is 1000 W, so what is the current flowing in the primary coil?

A step-down transformer converts 100 V into 230 V. The power output is 2,000 W, so what is the current flowing in the primary coil?

In a transformer, the primary voltage is 24 V and the secondary voltage is 12 V. If there are 200 turns on the primary coil, how many turns are on the secondary coil?

A secondary coil has a current of 25 A and a voltage of 5 V. On the primary coil the current is 15 A. Find the primary voltage.

What is the equation for energy lost due to heating?