How does a transformer works

What type of current do transformers work with?

• Magnetic Current

• Static Electricity

• Direct Current (DC)

• Alternating Current (AC)

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What happens to the magnetic field when AC current is passed through a cable?

• It turns into electrical energy

• It remains constant

• It disappears

• It increases and decreases in strength and changes polarity

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

• To guide the magnetic field along a path to the secondary coil

• To reduce the voltage

• To increase the current

• To generate electricity

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What is the effect of laminated sheets of iron in the transformer's core?

• Greatly reduce Eddy currents

• Generate more electricity

• Convert AC to DC

• Increase the magnetic field

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In a step-up transformer, what happens to the voltage and current in the secondary coil?

• Both voltage and current increase

• Voltage increases, current decreases

• Both voltage and current decrease

• Voltage decreases, current increases

How can the voltage be increased in a step-up transformer?

• By using a larger iron core

• By reducing the number of turns in the coil on the secondary side

• By adding more turns to the coil on the secondary side

• By using a stronger magnetic field

What is the main reason for using a step-up transformer in power stations?

• To generate more power

• To reduce the current and minimize losses in transmission cables

• To convert DC to AC

• To make electricity safe for home use

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Why does electromotive force not occur when DC current is passed through the primary coil?

• Because the magnetic field is constant

• Because it's converted into AC

• Because the coil is not wrapped properly

• Because DC cannot generate magnetic fields

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