Question 1
Physics
The diagram below illustrates a pulley system used to raise a 10 kg load. If the effort needed to raise the load is 70 N, calculate the efficiency of the machine. [g-10 ms-2]
20.0%
35.7%
50.0%
75.0%
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Question 1
The diagram below illustrates a pulley system used to raise a 10 kg load. If the effort needed to raise the load is 70 N, calculate the efficiency of the machine. [g-10 ms-2]
20.0%
35.7%
50.0%
75.0%
Question 2
The diagram below illustrates the force- displacement graph of a body. Calculate the work done during the first 20 m of motion.
1000J
825J
750J
825J
Question 3
The dispersion of light would result in which of the following phenomena ?
Eclipse
Shadow
Rainbow
Mirage
Question 4
The best color of shirt to be won on a bright noon day is ?
red
black
green
white
Question 5
The image formed when an object is placed between the focus and centre of a converging lens is
real, inverted and magnified.
real, inverted and diminished.
erect, virtual and magnified
erect, virtual and diminished.
Question 6
For a charged body moving in an electric and magnetic crossed field, the ratio of the electric field intensity, E to the magnetic flux density, B is known as
Lorentz ratio
Charge ratio
Velocity selector.
Electrochemical equivalence.
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