Answer:
True.
Explanation:
According to Lenz's law, the induced current in a circuit always flows to oppose the external magnetic field through the circuit. This statement is true.
The Faraday's law of induction is given by :
Here, negative sign shows that the direction of induced emf is such that opposes the changing current that is its cause.
Hence, the statement is true.
The flux of is given by the surface integral
where is the given square region, which we can parameterize by
with and
. The area element is
where is the normal vector to
. Depending on the orientation of
, this vector could be
or ; either way, the integral reduces to
Answer:
Explanation:
Given
Mass of child
speed of child is
Moment of inertia of merry go round is
radius
Conserving the angular momentum
Newton's 2nd law
input the value: