<span>The formula for inductance X is X=2*pi*freq*L. With the given information, we solve for L. The equation becomes: L = X/(2*pi*freq). Substituting the known variables gives us L = 147ohms / (2*pi*2000hz). Solving for L, L equals .0117. The inductance of this inductor is 11.7 mH.</span>
Answer:
Please see answer below
Explanation:
The uncertainty will depend of the granularity of the instrument you use for the measurement.
For example, if you measure the length of a tabletop with a measuring tape with the smaller divisions given by the mm for example,then your measurement is limited by 1 mm (it cannot be better than that because your instrument doesn't have a finer division)
If you are using a digital scale to measure the weight of an object for example, and the scale displays in the readout 26.3 grams, then your uncertainty becomes 0.1 gram because that is the best your scale can read.
If on the other hand your scale reads no better than the gram, and gives you just 26 in the display, then the resolution of the scale is 1 gram, and that is what the uncertainty in your measurement is.
You have to report it as: 26 ± 1 g
Answer:
a)
b)
Explanation:
The current flowing in a R-L series circuit is given by
Where τ is the time constant and is given by
Where L is the inductance and R is the resistance
Assuming the current has reached steady state when it is at 99% of its maximum value,
Therefore, it would take t = 4.6τ to reach the steady state.
(b) If an emergency power circuit needs to reach steady state within 1.2 ms of turning on and the circuit has a total resistance of 72 Ω, what values of the total inductance of the circuit are needed to satisfy the requirement?
Therefore, an inductance of 0.0187 H is needed to satisfy the requirement.
Answer:
The bimetallic strip will bend to the iron's way since
When heated copper expands more than iron
Explanation:
bimetallic strips are temperature regulatory devices used to convert a temperature change into mechanical displacement.
It consists of two layers, usually iron and copper which layers are joined together to form the strip owing to the difference in the constants of expansion of the two materials, a flat strip will bend one way (toward the iron part) if heated. The linear thermal expansion coefficient relates the change in temperature to the change in a material's linear dimensions.