AC And DC Generation

Question 1

In order to induce an EMF, we require a length of X, a magnetic X, and relative X between the two.

Answer 1

Conductor, field, motion

e = blv

Question 2

If a conductor is travelling parallel with the magnetic field the induced voltage would be X, and a maximum voltage would be induced if the conductor cuts the field at X angles

Answer 2

Zero, right (90)

Question 3

The internal voltage induced in the armature ( active length of conductor) of any generator is X (Ac or DC)

Answer 3

AC

Question 4

The most practical method of controlling the output voltage of any generator is by using a field X

Answer 4

Rheostat

Question 5

The number of cycle per second of an AC waveform is called the X

Answer 5

Frequency

Question 6

Commercially used AC is generated at X cycles/second

Answer 6

60

Question 7

Another term for ‘cycles per second’ is X

Answer 7

Hertz

Question 8

AC is continuously changing in X and X

Answer 8

Magnitude, direction

Question 9

The X hand rule is used to identify the X of induced voltage when the field polarity and the direction of conductor motion for a generator is known.

Answer 9

Left, direction

Question 10

The ‘letters’ used to identify the factors affecting voltage generated are?

Answer 10

e = blv

b = Flux density
l = Length of conductor in meters
v = velocity (speed) expressed in meter/ second
e = voltage generated expressed in volts

** 1 V = 1 Weber per second **

** 1 Weber = 10^8 flux lines **