Exam 14: Time Response of Reactive Circuits

A step-up transformerW ill increase ________ and decrease ________.

If 10W of power are applied to the primary of an ideal transformer With a turns ratio of 1:5, the power delivered to the secondary load is ________.

If a 12 V battery is connected across the primary of a transformerW ith a turns ratio of 1:4, then the secondary voltage is ________.

The hysteresis loss in a transformer is ________.

The primary to secondary resistance should be relatively low.

Transformer cores are made from laminated iron to reduce losses.

When a 1 $\mathrm { k } \Omega$ load resistor is connected across the secondary winding of a transformer with a turns ratio of 2: 1 , the source "sees" a reflected load of________

When a 1 $\mathrm { k } \Omega$ load resistor is connected across the secondary winding of a transformer with a turns ratio of 1: 2 , the source "sees" a reflected load of______________

$\text { Figure } 14 < 1$ -In Figure 14-1, if the primary to secondary turns ratio is 7.5:1, the output voltage equals________

The relationship for the voltage ratio $\left( \mathrm { V } _ { \mathrm { sec } } / \mathrm { V } \text { pri } \right)$ in a transformer is:

The impedance matching characteristic for a transformer is needed for a situation Where maximum power transfer to the load is desired.

Only the number of turns in the primary and secondary of a transformer determines the actual secondary Voltage.

What is the problem if a power transformer is delivering a low output voltage even though the primary voltage is correct?

A center tap transformer has a connection at the midpoint of the secondaryW inding resulting in:

The relationship for the current ration $\text { (I } \mathrm { I } _ { \mathrm { sec } } / \mathrm { I } \text { pri) }$ in a transformer is:

$\text { Figure } 14 < 1$ -In Figure 14-1, if there are five times more turns in the primary than in the secondary, then What is the secondary voltage?

The relationship for the impedance matching ratio $\text { (RL/Rpri) }$ in a transformer is:

Eddy current loss in a transformer is ________.

$\text { Figure } 14 < 1$ -In Figure 14-1, the primary to secondary turns ratio is 1:3 and the secondary current equals 120 mA.What is the primary current?

An ideal transformer has no power loss.