1200W
600W
120W
30W
Correct answer is A
An a.c current is usually expressed as I = Io sin wt; and comparing this with the given current I = 10sin (120π)t, => Io = 10. and power in an a.c circuit is given as: P = I2R = (102 x 12) = 1200W
The diagram above represents the graph of the force F applied in stretching a spiral spring against ...
At what frequency would a 10H inductor have a reactance of 2000Ω? ...
If the pressure of the vapor on top of an enclosed liquid is equal to the atmospheric pressure, what...
A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. C...
A man standing on a lift that is descending does not feel any weight because ...
Which of the following operations can be used to convert an alternative current dynamo into a direct...
2000cm3 of a gas is collected at 27oC and 700mmHg. What is the volume of the gas at standard tempera...
In which of the following situations is photoelectric effect employed? I. Automatic devices for swi...
Which of the following concepts is not an evidence of the particles nature of matter? ...
A metal of mass 0.5kg is heated to 100°C and then transferred to a well-lagged calorimeter of heat ...
Abstract Reasoning Questions and Answers
Typing Speed and Accuracy Test
Spatial Reasoning Questions and Answers
Personality Test
Data Interpretation Questions and Answers
Numerical Reasoning Questions and Answers
Microsoft Office Questions and Answers
Logical Reasoning Questions and Answers
Nigeria General Knowledge Questions and Answers
Puzzles Questions and Answers
Situational Judgement Questions and Answers
Verbal Reasoning Questions and Answers
Quantitative Reasoning Questions and Answers
See all →