Transformer Quiz

What type of electricity can transformers work with?

• Both AC and DC

• DC

• None of the above

• AC

What is the key component that induces current in the secondary coil of a transformer?

• Voltage

• Resistance

• Current

• Magnetic field

What material is commonly used as the core of a transformer to guide the magnetic field?

• Iron

• Aluminum

• Steel

• Copper

What is the purpose of using laminated sheets of iron in a transformer core?

• To reduce voltage

• To reduce Eddy currents

• To increase Eddy currents

• To increase voltage

What is the function of a step up transformer?

• Decrease current

• Increase voltage

• Decrease voltage

• Increase current

In a step down transformer, what happens to the current?

• Remains the same

• Decreases

• Reverses direction

• Increases

Why are three phase transformers commonly used in commercial buildings and power stations?

• To complicate wiring

• To balance loads

• To increase losses

• To reduce efficiency

What configuration is commonly used to connect the coils in a three phase transformer?

• Delta Delta

• Wye Wye

• Delta Wye

• Wye Delta

What is the purpose of grounding the centre point in a three phase transformer?

• To increase voltage

• To provide a neutral line

• To reduce losses

• To balance loads

What is the term used to describe the movement of free electrons in a secondary coil due to a changing magnetic field?

• Current

• EMF

• Voltage

• Resistance