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Updated: Nov 4, 2024
Answer: Option C
View the videos below to learn how to solve it. There are more than one method.
Alternatively, you may put values to work out using the 2 basic formulae of P = IV and V = IR. Refer the video below.
Similar question
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Answer: Option D
Solutions:
a) 38.8o    b) 41.8o
c) 51.2o . The ray does not emerge as total internal reflection has occurred. The angle of incidence is greater than critical angle and the light is traveling from a denser towards a less dense medium.
Click here to view the video tutorial for working and explanation for (a) and (b).
Click here to view the video tutorial for working and explanation for (c) and (d).
A man is standing on a uniform plank of mass 20 kg and 6 m long. He is standing 1 m from the string at A.
a) Find the unknown forces FA and FB. (Ans: Fa = 550 N and FB = 250 N)
The man now walks to the left of A.
b) Determine the maximum distance in which the man can move before the plank topples. (Ans: d = 0.67 m)