Step up transformer calculations

The video tutorial explains the functioning of step-up transformers, focusing on how they increase voltage while decreasing current. It provides examples and formulas for calculating voltages, turns, and currents on both primary and secondary sides. The tutorial also emphasizes the importance of power consistency across the transformer. The session concludes with a summary of the key points discussed.

What happens to the current when the voltage is increased in a step-up transformer?

• The current increases.

• The current decreases.

• The current remains the same.

• The current fluctuates.

If a transformer has 100 turns on the primary and 200 on the secondary, and the input voltage is 120 volts, what is the output voltage?

• 240 volts

• 2400 volts

• 120 volts

• 60 volts

Which formula would you use to find the input voltage if you only know the output voltage and the number of turns?

• The formula for calculating secondary current.

• The formula for calculating power.

• The formula for calculating primary voltage.

• The formula for calculating input voltage.

How can you find the primary current if you know the secondary current and both voltages?

• By using the formula for primary current.

• By using the formula for voltage ratio.

• By using the formula for power conservation.

• By using the formula for secondary current.

How do you verify that power is conserved in a transformer?

• By comparing the number of turns on both sides.

• By checking that the voltage is the same on both sides.

• By ensuring the current is the same on both sides.

• By multiplying voltage and current on both sides and checking equality.