T2 Part 5 Flashcards
The transformer operates on the principle of :
Mutual inductance or
static induction
In a step-down transformer, which statement is true :
The primary winding has more turns
Eddy currents can be reduced by:
Laminating the iron core
Copper losses are due to, current flowing through the resistance of the
windings. The equation that would be used to calculate copper losses is… :
P=l2xR
When the plate area of a capacitor increases :
the capacitance increases
Which has the lowest dielectric constant :
Air
As a capacitor is being charged, current flowing into the capacitor will :
decrease
Lines of magnetic flux are considered to have a number of properties.
The correct property in the following list is:
They have a definite direction
A permanent magnet requires
No power source
Static induction is the principle behind the operation of the
Transformer
device designed to be capable of storing electric charge is called a:
Capacitor
The unit of capacitance is the:
Farad
When an inductive load is connected to an AC supply,
The current lags the voltage.
Which of the following losses are associated with a transformer?
Iron losses and copper losses.
Which of the following is an advantage of steel conduit?
Affords cables good mechanical protection.
