DC Motor and Transformers

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• B

• C

• D

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• A

• B

• C

• D

• A

• B

• C

• D

• 1

• 2

• 3

• 4

• 1

• 2

• 3

• 4

• 1

• 2

• 3

• 4

• Away from magnet

• Towards the magnet

• Upwards

• Downwards

A transformer has 100 turns in the primary coil and 25 turns in the secondary coil. When a 120 V is applied to the primary coil, what is the voltage in the secondary coil?

• 480V

• 30V

• 20V

• 450V

A transformer having turns ratio of 300 : 2400. What type of transformer is this?

• Step down transformer

• Ideal transformer

• Step up transformer