# Case Study: Nikola Tesla

In this lesson we learn about the engineering genius of Nikola Tesla and how Tesla's alternating current system won out over Edison's direct current system.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which statement below is incorrect?

1/6

Q2.Sort the statements below into true and false
Step-up transformers decrease the potential difference.
Step-up transformers decrease the current.
Lower current means less power loss due to resistance.
Lower current means less energy is transferred.

2/6

Q3.A transformer has 8000 turns on the secondary coil. The secondary voltage is 32,000 V and the primary voltage is 415 V. What is the number of turns on the primary coil? (to 3 significant figures)

3/6

Q4.A transformer has 500 turns on the primary coil and 250 turns on the secondary coil. If the primary voltage is 230 V, what will the secondary voltage be?

4/6

Q5.A transformer has a primary voltage of 12 V and a primary current of 2 A. If the secondary voltage is 24 V, what will the secondary current be?

5/6

Q6.A transformer with 1000 turns on the primary coil and 3000 turns on the secondary coil needs to produce an output current of 4.8 A. What will the input current be?

6/6

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which statement below is incorrect?

1/6

Q2.Sort the statements below into true and false
Step-up transformers decrease the potential difference.
Step-up transformers decrease the current.
Lower current means less power loss due to resistance.
Lower current means less energy is transferred.

2/6

Q3.A transformer has 8000 turns on the secondary coil. The secondary voltage is 32,000 V and the primary voltage is 415 V. What is the number of turns on the primary coil? (to 3 significant figures)

3/6

Q4.A transformer has 500 turns on the primary coil and 250 turns on the secondary coil. If the primary voltage is 230 V, what will the secondary voltage be?

4/6

Q5.A transformer has a primary voltage of 12 V and a primary current of 2 A. If the secondary voltage is 24 V, what will the secondary current be?

5/6

Q6.A transformer with 1000 turns on the primary coil and 3000 turns on the secondary coil needs to produce an output current of 4.8 A. What will the input current be?

6/6

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Quiz:

# Case Study : Nikola Tesla

Q1.Sort the following statements into True or False
Nikola Tesla was born during a lightning storm.
Nikola Tesla invented batteries.
Nikola Tesla invented the system used to distribute electricity in every country in the world.
Nikola Tesla cured Mark Twain of constipation.

1/4

Q2.What was Nikola Tesla really good at?

2/4

Q3.Sort the statements below into the advantages and disadvantages of alternating current electricity,
A well made transformer is nearly 100% efficient.
High potential differences can be used, so lower currents will be needed over long distances, increasing the efficiency of the system.
Alternating current systems result in cheaper energy bills.
Transformers allow the potential difference to be increased and decreased.
Transformers are heavy and expensive to build.

3/4

Q4.Why does direct current not work with transformers?

4/4

Quiz:

# Case Study : Nikola Tesla

Q1.Sort the following statements into True or False
Nikola Tesla was born during a lightning storm.
Nikola Tesla invented batteries.
Nikola Tesla invented the system used to distribute electricity in every country in the world.
Nikola Tesla cured Mark Twain of constipation.

1/4

Q2.What was Nikola Tesla really good at?

2/4

Q3.Sort the statements below into the advantages and disadvantages of alternating current electricity,
A well made transformer is nearly 100% efficient.
High potential differences can be used, so lower currents will be needed over long distances, increasing the efficiency of the system.
Alternating current systems result in cheaper energy bills.
Transformers allow the potential difference to be increased and decreased.
Transformers are heavy and expensive to build.

3/4

Q4.Why does direct current not work with transformers?

4/4

# Lesson summary: Case Study: Nikola Tesla

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance