<h2>The emf produced is 7.2 V</h2>
Explanation:
When coil is placed in the magnetic field , the flux attached with it can be found by the relation . Flux Ф = the dot product of magnetic field and area of coil .
Thus Ф = B A cosθ
here B is magnetic field strength and A is the area of coil .
The angle θ is the angle between coil and field direction .
When coil rotates , the angle varies . By which the flux varies . The emf is produced in coil due to variation of flux . The relation for this is
The emf produced ξ = - 
= B A sinθ 
Now in the given problem
5 = 0.38 x A x I
Now if the magnetic field is 0.55 T and all the other terms are same , the emf produced
ξ = 0.55 x A x Ii
dividing II by I , we have
= 
= 1.45
or ξ = 7.2 V
He was the first American to orbit the earth.
Answer:
Explanation:
Given:
- work done to stretch the spring,
- length through which the spring is stretched beyond equilibrium,
- additional stretch in the spring length,
<u>We know the work done in stretching the spring is given as:</u>
where:
k = stiffness constant
Now the work done in stretching the spring from equilibrium to (
):
So, the amount of extra work done:
Answer:
24.7 s
Explanation:
Question is appear to be missing. Found it on google:
"a) If there were no air resistance, how long would it take to fall?"
Solution:
We can solve the problem by using the following equation of motion for a uniform accelerated motion:
where
d = -3000 m is the displacement of the raindrop (negative because in the downward direction)
u = 0 is the initial velocity of the raindrop if we assume it starts from rest
t is the time taken for the fall
a = g = -9.8 m/s^2 is the acceleration of gravity
Solving the equation for t, we find:
