L2 week3 Flashcards Preview

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Flashcards in L2 week3 Deck (16):
1

Degree

Angular measurement equal to 1/360 of the circumference of a circle.

2

Radian (rad):

Angle formed when the distance along the circumference of a circle equal the radius of the circle.

3

PI:

The ratio of the circumference of a circle to its diameter. Has a constant value ≈ 3.1416

4

Angular measurements can be made in

degrees or radians.

5

There are ...... or ...... radians in one complete revolution.

360 or 2pi

6

rad =

(pi/180)*degree

7

degree=

(180/pi)*rad

8

The positive amplitude in the sine wave is equal to

90 degree
pi/2

9

the middle of the sine wave is equal to

180 degree
pi

10

the negative amplitude in the sine wave is equal to

270 degree
3pi/2

11

Phase:

Angular measurement that specifies the position on the sine wave relative to a reference point.

12

Sine wave shifted right

lags (-ve phase shift)

13

Sine wave shifted left

leads (+ve phase shift)

14

Phase shift

Occurs when a sine wave is shifted right or left in relation to the base/reference sine wave.

15

An important application of phase-shifted sine waves is in

electrical power systems

16

Electrical utilities generate ac with three phases that are separated by

120 degrees