A machine of efficiency 80% is used to lift a box. If the...
A machine of efficiency 80% is used to lift a box. If the effort applied by the machine is twice the weight of the box. Calculate the velocity ratio of the machine
0.50
0.63
0.80
1.60
Correct answer is B
Y = \(\frac{M.A}{V.R} \times \frac{100}{1}\)
= \(\frac{\frac{1}{2}}{V.R} \times \frac{100}{1}\)
V.R = 0.625
Which of the following is/are not affected by a magnetic field? I. Neutrons II. Cathode rays III....
A wave of weight length 0.30m travels 900m in 3.0s, calculate its frequency ...
A ray incident on a glass prism undergoes minimum deviation when the ...
The diagram above represents a transverse travelling wave. Which two points are 180° out of phas...
The pressure of a fixed mass of an ideal gas at 27°C is 3 pa. The gas is heated at a constant vo...