80J
120J
300J
500J
Correct answer is C
Efficiency = outputinput x 100 40 = 20×10input x 1001 input = 500J work against friction = input - output = 500 - 200 = 300J
In the diagram above, a 200 W bulb is lighted by a 240 V a.c mains supply. If 1kwh is sold at N40, t...
For the wave motion represented above The wavelength is given by...
An immersion heater rated 2.0A, 240V is used to boil water from temperature 52°c to 100°c. If the ...
As the pressure of a fluid increases, its viscosity ...
In a slide wire bridge, the balance is obtained at a point 25cm from one end of wire 1m long. The re...
Which of the following consists entirely of vector quantities? ...
the ray which causes gas molecules to glow is known as ...
Natural radioactivity is the random spontaneous disintegration of the nuclei of heavy isotopes of ce...
A ray of light is incident on a body x as shown in the diagram above. What is the refractive index o...
A 10- Ω coil takes 21 s to melt 10g of ice at 0oC. Assuming no heat losses, determine the current i...
Personality Test
Nigeria General Knowledge Questions and Answers
Logical Reasoning Questions and Answers
Data Interpretation Questions and Answers
Situational Judgement Questions and Answers
Numerical Reasoning Questions and Answers
Spatial Reasoning Questions and Answers
Puzzles Questions and Answers
Microsoft Office Questions and Answers
Quantitative Reasoning Questions and Answers
Abstract Reasoning Questions and Answers
Verbal Reasoning Questions and Answers
Typing Speed and Accuracy Test
See all →