Science - Transformers 2365-02

What is mutual induction?

• The process where two coils are placed in close proximity and an alternating current is passed through one of them.

• The process of generating electricity using a single coil.

• The method of using a battery to power a coil.

• The technique of using magnets to create a static field.

What is the primary function of a transformer?

• To store electrical energy

• To convert AC to DC

• To step-up or step-down voltage and current

• To generate electricity

What is a common characteristic of all transformers?

• They all have the same size.

• They all operate in the same basic way.

• They all have the same shape.

• They all use the same voltage.

Which type of transformer is used to reduce voltage in a three-phase system?

• Current transformer

• Potential transformer

• Three-phase pole-mounted step-down transformer

• 110v Transformer

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

• To increase the size of the transformer

• To reduce energy losses

• To change the frequency of the current

• To increase the voltage

What is generated within a coil when there is a changing magnetic field?

• Induced emf

• Electric current

• Magnetic force

• Heat energy

What is the practical application of mutual induction?

• Transformer

• Electric motor

• Battery

• Resistor

What happens to the output voltage if there is an equal number of turns on both the primary and secondary windings in a transformer, assuming no losses?

• The output voltage will be zero.

• The output voltage will be equal to the input voltage.

• The output voltage will be double the input voltage.

• The output voltage will be half the input voltage.

What happens to the voltage in the secondary winding when there are more turns on the primary winding?

• The voltage in the secondary winding increases.

• The voltage in the secondary winding decreases.

• The voltage in the secondary winding remains the same.

• The voltage in the secondary winding fluctuates.

What is the result of increased induction in each secondary turn from the excess primary turns?

• Decrease in available current in the secondary.

• Increase in available current in the secondary.

• No change in available current in the secondary.

• Fluctuation in available current in the secondary.