4.0 x 102W
5.0 x 102W
4.0 x 103W
5.0 x 103W
Correct answer is D
In general, power = IV; 40kw = IV. ∴ 40,000 = 1 x 800 1 = (40.000)/800 = 50A. tune the current through resistor = 50A. ∴ power loss = 12R = 502 X 2 = 2500 X 2 = 5.0 X 103W
The diagram above represents balls in an undulating surface. Which of the following option represent...
Which of the following colours of surfaces will radiate heat energy best? ...
A proton of charge 1.6 x 1019C is projected into a uniform magnetic field of flux density with a con...
400g of cold water is added to 200g of water at 70°C. If they are properly mixed and the temperatur...
How far from a cliff should a boy stand in order to hear the echo of his clap 0.9s later? (Speed of ...
If the direction of the curent in a straight wire is reversed, the magnetic field ...
Absorption line spectra exhibited by atoms is a result of ...
A 50kg block is dropped from a point 10m above as shown in the fig above. if the force constant of t...
Given that the gravitational constant is 7 X 10-11 Nm2kg-2, what is the force of attraction between ...
A lamp rated 100W, 240V is lit for 5hours. Calculate the cost of lighting the lamp if 1kWh of electr...
Numerical Reasoning Questions and Answers
Logical Reasoning Questions and Answers
Puzzles Questions and Answers
Personality Test
Nigeria General Knowledge Questions and Answers
Quantitative Reasoning Questions and Answers
Spatial Reasoning Questions and Answers
Microsoft Office Questions and Answers
Abstract Reasoning Questions and Answers
Verbal Reasoning Questions and Answers
Situational Judgement Questions and Answers
Typing Speed and Accuracy Test
Data Interpretation Questions and Answers
See all →