U7.5 – Alternating Currents

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Alternating Currents

1 / 10

What does AC stand for?

2 / 10

A step up transformer...

3 / 10

A step down transformer...

4 / 10

What is the number of turns on the primary coil of a transformer if it's input voltage is 720V and it's output voltage is 245 V with 350 turns on the secondary coil?

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What is the input current of a transformer if has 535 turns on it's primary coil and it's output current is 2.0 A with 50 turns on the secondary coil?

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If a transformer has 400 turns on it's primary coil, and 200 turns on it's secondary coil it is...

7 / 10

The frequency of UK mains ac is 50 Hz, what is it's time period?

8 / 10

Using this diagram, which arrow is measuring the peak voltage?

 

9 / 10

A wire carries an alternating current of peak value 2 A. Calculate the root mean square value the current.

10 / 10

An ac supply has an V0 value of 3 V and a root mean square current of 0.52 A. Calculate the root mean square power of the supply.

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