Answer:
Explanation:
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- (a) Maximum emf: 90 V (2 sig. fig.)
- (b) Emf at π/32 s: 85 V.
- (c) t = 0.125 s.
<h3>Explanation</h3><h3>(a)</h3>
The maximum emf in the coil depends on
- the maximum flux linkage through the coil, and
- the angular velocity of the coil.
Maximum flux linkage in the coil:
.
Frequency of the rotation:
.
Angular velocity of the coil:
.
Maximum emf in the coil:
.
<h3>(b)</h3>
Emf varies over time. The trend of change in emf over time resembles the shape of either a sine wave or a cosine wave since the coil rotates at a constant angular speed. The question states that emf is "zero at t = 0." As a result, a sine wave will be the most appropriate here since .
.
Make sure that your calculator is in the radian mode.
.
<h3>(c)</h3>
Consider the shape of a sine wave. The value of varies between -1 and 1 as the value of changes. The value of at time depends on the value of .
reaches its first maximum for when what's inside the sine function is equal to .
In other words, the first maximum emf occurs when
,
where
,
and
.
.
Answer:
Prob. D
Explanation:
I am also a Visual Learner.
Answer:
The Spring force
Explanation:
The Spring force is a force that is centered around, guess what, springs. Al that the Spring force says is that when a spring is compressed or stretched out, it will return to the state that it was originally in, and because it is retracting it falls under the Spring force.
The correct answer is <span>(a) biomass
Biomass is carbon based just like coal and oil which are bad because they're fossil fuels. However, unlike them, biomass is renewable, which is good, but is also bad for the environment.</span>