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A body of mass 2 kg thrown vertically upwards with a velocity 40 m/s comes to instantaneous rest at a height 50 m. Is there any other force (other than gravitational force), if yes then calculate the value. Ans) Yes , a force due to air drag will be there , to calculate this wehave to first find work done by air drag..Acc. To work-energy theoremWgravity + Wair drag = change in K.E.-Mgh +Wair drag = change in K.E.Wair drag =change in K.E. +mgh=[0-1/2mu2] +mgh = -1/2 x 2 x (40)2 + 2x 10 x 50 = -1600+1000 = -600Jnow w.d. = F x sF= -600/50 = -12N
Light coupling: Another way to look at light guiding in a fibre is to measure the fibre's acceptance angle. This angle is the angle within which the light should enter the fib
Why because it is not a source as Li-ion battery. If we want to measure the voltage(build in voltage) with in the diode we have to use the external source. We can''t directly measu
What do you mean by thermal neutron? What is its importance? What do you mean by annihilation of matter? Given an example
Resistivity of conductors is most affected by (A) Composition. (B) Temperature. (C) Pressure. (D) Current. Ans: Resistivity of conductors is most
define like and unlike parallel forces
No;(Personal Note:Please Rate this and let me know if this helps) Reason: From the quantisation of charge charactersistic, we can say that charge comes in integral multiple of e (
The phenomenon of the formation of the Newton's rings can be explained on the basis of wave theory of light. When a light ray iP1 from an extended monochromatic light source S is a
A transformer takes a current of 1A when its primary is connected to a 300V, 50Hz supply, the secondary being on open-circuit. If the power absorbed is 120watts, Determine
how to calculate acceleration?
At 200.0 K, germanium has 1.16 x 10 10 thermally liberated charge carriers/cm 3 . If it is doped with 1 As atom to 525,000 Ge atoms, what is the ratio of doped carriers to the
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