Answer:
Open circuited
Explanation:
On moving a coil of conductor in a magnetic field a voltage is induced through the conductor, this is called Law of Electromagnetic induction.
As the moving coil will induce some voltage in the conductor, but the current through it will be zero unless we do not connect it with a load to complete the circuit.
As in a open circuit, the amount of current flow is zero.
Also, the voltage is zero in a short circuit.
So, the current in the conductor will be zero unless we do not connect it with a load to complete the circuit.
In case of motors, the voltage is given to the conductor to rotate the coil, due to rotation of the coil some voltage is induced backwards to the conductor which is called back EMF.
Snap rings, and bearings can be used to keep a gear on a shaft, hope this helps!!
Answer:
Explanation:
<u>The Differential of Multivariable Functions</u>
Given a multivariable function V(r,h), the total differential of V is computed by
The volume of a cylinder of radius r and height h is
Let's compute the partial derivatives
The total differential is
The differential dr is approximated to and the differential dh is approximated to . We can see the increment of radius is the thick of the metal in the sides, and the increment of the height is the thick of the metal in the top and bottom. Thus dr=0.05 cm, dr=0.2 cm
Answer:
a)mass flow=6lbm/s
b)the temperature at the compressor exit= 1269◦F
Explanation:
Hello!
To solve this problem we will perform the following steps
1.Use thermodynamic tables to find the density and entalpy of the air using the properties of temperature and pressure (2 psia and 77.3 ° F)
Density = 0.06032 lbm / ft ^ 3
h1=entalpy=351.2Btu/lbm
2.
Calculate the mass flow by multiplying the flow by the density, remember to apply conversion factors
3.We apply first law of thermodynamics in the compressor, it establishes that the energy that enters a system is the same that must come out.
Energies entering the compressor =
-Electric power (800hp)
=W=565.65btu/s
-flow energy (mh1)
energies coming out of the compressor
-heath= (Q)(m
)
-flow energy (mh2)
applying the above we have the following energy balance equation
W+mh1=Qm+mh2
Our goal is to determine the value of the enthalpy of output h2 in order to find the air temperature using thermodynamic tables
4.finally we use thermodynamic tables to find the temperature using enthalpy
T2=1269◦F