A24-Transformers 1

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In a transformer this transfer of energy from one winding to another is called
1. Mutual capacitance
2. Common mode
3. Switch mode
4. Mutual inductance
A transformer has 50 turns on the primary and 200 on the secondary. If it is fed with 240VAC the output from the transformer will be:
1. 60 Volts AC
2. 60 Volts DC
3. 960 Volts AC
4. 960 Volts DC
The best core for a transformer operating at 230 Volts, 50Hz is
1. A dielectric
2. Ferrite
3. A solid piece of iron
4. Laminated iron plates
A transformer coupling an antenna to an RF amplifier has 10 turns on the primary and 30 turns on the secondary. If the impedance of the input is 50 Ohms what is the impedance of the secondary?
1. 0.002 Ohms
2. 120 Ohms
3. 245 Ohms
4. 450 Ohms
When a transformer core heats up this is because of the formation of:
1. Eddy currents
2. SWR currents
3. Direct currents
4. Indirect currents

A24-Transformers 1

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