Exam 14: Transformers

What is the number of turns in a primary winding, when the voltage applied to a transformer input is 24 Vac with a 225-turn secondary output of 360 V?

Figure 14-2 -Which transformer loss is greatly reduced by laminating the iron core?

In a step-up transformer, the secondary has more turns of wire than does the primary.

In a given transformer, 87% of the flux produced in the primary is coupled into the secondary winding, what is the coefficient of coupling?

A transformer would never be selected to:

The ability to transfer energy from one coil to another is dependent upon .

Even though two coils do not share a common core, they can have some amount of mutual inductance.

-Which of the following are common applications for a transformer?

The product of input voltage and input current in a transformer is equal to the output voltage times the output current, minus any power losses.

Laminated iron-core or silicon steel) transformers are normally used for:

A voltage is induced in a transformer secondary winding by the action of the:

With 100 V of primary voltage and a 1:3 turns ratio, the output voltage will be:

A transformer can be used to step-up increase) voltage.

Figure 14-2 -The transformer shown in Figure 14-2 is called:

Air core or ferrite core transformers are normally used for:

-The two round dots in Figure 14-1 indicate:

A transformer can pass a steady state DC from the primary to the secondary.

The ratio of the amount of flux linking the secondary coil versus the primary flux is called:

When a transformer secondary lead has been connected to a middle loop that is not an end connector, it is called a:

Which coil would be used as a step-up transformer primary, if coil number 1 has 100 more turns than coil number 2?