1. The form factor in reference to alternating current wave form represents the ratio of

a. the average value to the R.M.S value

b. the peak value to the R.M.S values**c. the R.M.S value to the average value**

d. the R.M.S value to the peak value

2. If the current and voltage are out of by 90 degree the power is

a. Minimum

b. Maximum**c. Zero**

d. 1.1 V.I

3. The form factor of a 220 V , 50 Hz A.C waveform is

a. 1.5

b. 1.14**c. 1.11**

d. 0.85

4. For the above wave the rms value will be

a. 1.1 A

b. 1.5 A**c. 1.528 A**

d. 2 A

5. The average value of the above voltage is

a. ymax/2

b. ymax/3**c. 2/3 ymax**

d. 3/2 ymax

6. The form factor will be

a. 1.0

b. 1.100

c. 1.11**d. 1.187**

7. The peak factor of a wave is**a. maximum value / r.m.s value**

b. maximum value / average value

c. average value / r.m.s value

d. r.m.s value / average value

8. In the above case the value of which parameter for full sine wave will be more?

a. form factor

b. peak factor**c. average value**

d. none of the above

9. In the above case , the average value of the current will be

a. 5 A**b. 3.18 A**

c. 1.57 A

d. 1.10 A

10. When the sole purpose of an alternating current is to produce heat, the selection of conductor is based on

a. peak value of current

b.average value of current**c. rms value of current**

d. any of the above