A machine of velocity ratio 6 requires an effort of 400 N...
A machine of velocity ratio 6 requires an effort of 400 N to raise a load of 800 N through I m. Find the efficiency of the machine
55.6 %
50.0%
33.3%
22.2%
Correct answer is C
Efficiency = (MA)/V.R x 100% = (load)/Effort x (1)/V.R
= (800)/400 x (1)/6 x 100% = 33.3%
When the plate area of a capacitor increases? ...
Which of the following is/are not affected by a magnetic field? I. Neutrons II. Cathode rays III....
In the fig above, what is the angle of reflection of the ray of light at mirror M? ...
Which of the following quantities has the same unit as energy? ...
Which of the following is used for shielding radioactive fall-outs? ...
A satellite in circular motion around the earth does not have ...
An instrument used to measure relative humidity is the? ...
The instrument used by designers to obtain different color pattern is called? ...