Answer:
0.459 Tesla
Explanation:
Faraday's law:

Φ= NAB
V = N Δ (BA) /Δt
the change in BA
was: BA = 0 because initially B was zero.
V=IR
IR = N B A /Δt
q / Δt ×R = N B A / Δt
Or: B = q R / NA = 8.87 x 10^-3 × 45.0 / 1850×4.7 x 10^-4 =
= 0.459 Tesla
Answer: Increase in wave frequency
Explanation:
When we talk about acoustics we are dealing with sound waves, and one of their main components along with the velocity and wavelength is the <u>frequency.</u>
In this sense, the frequency of any wave refers to how fast (or slow) a wave oscillates. For example, in the especific case of sound waves when the oscillation is faster, the frequency is higher and the pitch gets higher as well.
Become more positive instead of negative
Answer:
0.35701 T
Explanation:
= Initial magnetic field
= Final magnetic field
= Magnetic flux
t = Time taken = 4.17 ms
N = Number of turns = 510
= Induced emf = 10000 V
r = Radius = 0.27 m
A = Area = 
Induced emf is given by

The magnetic field strength needed is 0.35701 T