Transformer Quiz

What is the main function of a transformer?

• Generate magnetic field

• Decrease voltage

• Generate electric current

• Increase voltage

What happens if the number of turns in the secondary coil is more than the number of turns in the primary coil?

• Voltage in the secondary is higher than the primary

• Voltage in the secondary is zero

• Voltage in the primary is higher than the secondary

• Voltage in the secondary is equal to the primary

Why can't transformers be used with a DC power supply?

• DC does not induce magnetic flux

• DC does not change the flux

• DC does not have coils

• DC does not generate electric current

What is the purpose of a ferromagnetic core in a transformer?

• To decrease the voltage

• To ensure flux equality between coils

• To increase the voltage

• To generate magnetic field

What is the effect of a step-up transformer?

• Generate electric current

• Generate magnetic field

• Increase voltage

• Decrease voltage

How does wireless charging work using a transformer?

• Secondary coil inside the phone and primary coil in the charging pad

• Secondary coil inside the charging pad and primary coil in the phone

• Direct connection between phone and charging pad

• No coils involved in wireless charging

What is Faraday's law of electromagnetic induction?

• Voltage is induced by changing magnetic flux

• Voltage is inversely proportional to resistance

• Voltage is directly proportional to current

• Voltage is induced by changing electric field

What is the role of the primary coil in a transformer?

• Connected to the supply

• Generate electric current

• Generate magnetic field

• Connected to the device being powered

Why is a transformer necessary for running a microwave oven?

• To decrease the voltage

• To increase the voltage

• To generate magnetic field

• To generate electric current

What is the significance of the number of turns in the secondary coil of a transformer?

• Determines the voltage transformation ratio

• Determines the size of the transformer

• Determines the magnetic field strength

• Determines the efficiency of the transformer