Answer:
b.only when the current in the first coil changes.
Explanation:
An induced current flow in the second coil only when there is a change in current in the first cool. A steady current will produce no change in flux (due to magnetic effect of a current) by the first coil, and according to Faraday, induced current is only produced when there is a change in flux linkage.
Answer:
concepts of inertia and gravity
Answer:
Water scarcity can mean scarcity in availability due to physical shortage, or scarcity in access due to the failure of institutions to ensure a regular supply or due to a lack of adequate infrastructure.
Explanation:
Answer:
Force = 6.25
so here correct option is a. 6.25
Explanation:
given data
resistance = 0.05 Ω
uniform magnetic field = 0.5 T
time = 0.1 s
to find out
maximum value of the force acting on the bar during that time
solution
we use here Faraday law of induction in the term of current
and solve here for I via the ohms law instead of the emf
That is end up by dividing by resistance
so here I will be
I = ..............1
I =
I = 25 A
and now l is length of 1 side of square when we solving for the force that is
Force = N*I²*B
Force = 1 ×25×0.5×0.5
Force = 6.25
so here correct option is a. 6.25
A because when gravity and the force are equilibrium it tend to be equal or stay at rest or constant velocity. But when the force of a plane is less than the force of gravity it will go down to the ground. Unless when the force of a plane is greater than the force of gravity, the plane will move upward at increasing rate.
Hope this helps