Short notes
Objective questions (Answers are given below)
- In a series R-L circuit, VL—VR by—degrees.
(a) lags, 45 (b) lags, 90
(c) leads, 90 (d) leads, 45 - The voltage applied across an R-L circuit is
equal to—of VR and VL.
(a) arithmetic sum (b) algebraic sum
(c) phasor sum (d) sum of the squares. - The power in an a.c. circuit is given by
(a) VI cos φ (b) VI sin φ
(c) I2Z (d) I2XL - The p.f. of an R-C circuit is
(a) often zero
(b) between zero and 1
(c) always unity
(d) between zero and − 1.0
1.c 2. c 3. a 4. b