Day 4 Notes

Question 1

Filters defined

Answer 1

Electronic circuits designed to allow or disallow specific frequencies

Question 2

Cutoff frequency defined

Answer 2

fCO

The point or frequency at which a filter will begin to pass or block signals

Question 3

Cutoff frequency equation for RL filters

Answer 3

fCO = R / (6.28*L)

Question 4

Cutoff frequency equation for RC filters

Answer 4

fCO=1/(6.28RC)

Question 5

Time constant

Answer 5

Tc

The amount of time required for an inductor or capacitor to reach 63% of its fully energized or charged state

Question 6

To achieve a fully energized or charged state requires

Answer 6

5 * Tc

Question 7

Transformers are

Answer 7

Electrical device used to transfer power or match impedances

Question 8

When the output impedance of a device matches the input impedance of a load

Answer 8

Maximum power is transferred

Question 9

Zin=Zout mean

Answer 9

Max power transfer

Question 10

Transformers can be used to

Answer 10

Increase or decrease AC voltages

Question 11

Never apply _____ to the primary of a transformer

Answer 11

DC

Question 12

Transformer operation turn ratio defined

Answer 12

The number of “turns” in the primary vs the “turns” in the secondary

Question 13

The relationship between voltage and current is_________ by the same turns ratio

Answer 13

inverse