28.0
48.0N
233.0N
50.0N
Correct answer is D
Given Data:
Efficiency = 40% Load = 120N, V.R = 6 (Number of Pulleys)
Efficiency = \(\frac{M.A}{V.R} * 100\)
40 = \(\frac{M.A}{6} * 100\)
6 * 40 = 100 M.A
M.A = \(\frac{240}{100}\) → 2.4
Where M.A = \(\frac{Load}{Effort}\)
2.4 = \(\frac{120}{Effort}\)
: Effort = \(\frac{120}{2.4}\) → 50N
white light Is an electromagnetic wave
the prism has all the colours of the white light
different colours of white light travel with different speeds in glass
white light has undergone total Internal reflection in the prism
Correct answer is C
No explanation has been provided for this answer.
High-energy electromagnetic waves
protons
neutrons
streams of electrons
Correct answer is D
Cathode rays are streams of electrons observed in vacuum tubes.
heat ----> Light----> Sound ----> Kinetic
Kinetic ----> Light ----> Heat ----> Electricity
heat ----> Kinetic ----> Electricity ----> Heat and Light
electricity ----> Kinetic ----> Heat ----> Light
Correct answer is C
The steam engine uses the Heat supplied from steam to supply kinetic energy into the generator which converts it to electricity to light the lamp, the lamp gives out light and heat as it works
What is the resultant resistance of the circuit in the image shown?
8Ω
11Ω
4Ω
3.6Ω
Correct answer is A
No explanation has been provided for this answer.
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