Answer:
option D= 50°
Explanation:
When sunlight passes through the first polarizer, the intensity reduces to its half
that is .........(1)
let the angle between the polarizers be θ
then we know that the intensity of light after passing through second polarizer is
⇒............(2) from (1)
also given that ..............(3)
equating 2 and 3 we get
on solving the above equation we get
θ= 50.75°≅50°
hence the angle between polarizers is 50°
option D is correct
Answer:
Kepler's laws apply: First Law: Planetary orbits are elliptical with the sun at a focus. Second Law: The radius vector from the sun to a planet sweeps equal areas in equal times. Third Law: The ratio of the square of the period of revolution and the cube of the ellipse semimajor axis is the same for all planets.
Solutions are basically a release from a problem. This is more than helpful.
Answer:
(a) Current will be
(b) Number of ions will be
Explanation:
We have given that resistance of the biological cell
(a) We have given potential difference of 75 mV
So
From ohm's law we know that current is given by
(b) We have given time t = 0.74 sec
We have to find the charge
We know that charge is given by Q = it, here i is current and t is time
So charge will be
So number of ions will be
Never is the correct answer