transformers 2

A step-up transformer is supplied with 100 V from a DC supply. What will the output voltage be?

The insulation at the transformer's core is meant for

• to avoid sharp edges.

• to avoid corrosion.

• to avoid electrical contact.

• to reduce power loss.

Select the facts about transformer.

• Will not work with DC and AC

• Will not work with DC

• AC will produce change in magnetic field

• AC will induce current

A step-down transformer has an input voltage of 50 V. The output voltage will be...

• less than 50 V

• 50 V

• greater than 50 V

A transformer has 15 turns on its primary coil and 30 turns on its secondary coil. This is a....

• step-up transformer

• step-down transformer

Primary loop is connected to the supply while secondary loop is connected to the load.

• True

• False

A transformer does not change the following:

• Frequency

• Voltage

• Current

• None of these

The core of a transformer is made of iron because...

• it is strong

• it conducts electricity

• it is a soft magnetic material

• it is a hard magnetic material

• it has a high melting point

This picture is an example of a ___________

• Step- Up Transformer
• Step- Down Transformer
• Motor
• Generator

Step-up transformer is a transformer that increases...

• voltage.

• current.

• resistance.

• conductance.