Answer: 500 volts AC, 750 volts DC
Class 00 rubber gloves are given the color "beige" based on the color code of rubber gloves.
The proof test voltage for this class of rubber gloves is 2500 volts of AC voltage and 10000 volts of DC voltage
Please mark it as brainliest answer:).
Answer:
The main reason for this is the ingredients found in the paint. Different Ingredients are used to make different types of color paints, therefore when each of these paints is used in connection with the solvent the different chemicals in the paint create a certain reaction with the chemicals in the solvent, and each reaction may be different in each color depending on the chemical compound.
Given:
max displacement, A = 3.2 m
f= 50 Hz
at t = 0, displacement, d = 150 cm = 1.5 m
Solution:
Displacement in the general form is represented by:
d = Asin(ωt ± α)
d = 3.2sin(2πft ± α)
d = 3.2sin(100πt ± α)
where,
A = 3.2 m,
ω = 2πf = 100π
Now,
at t = 0,
1.5 = 3.2sin(100π(0) ± α )
1.5 = 3.2sinα
sin α = = 0.4687
α = = 27.95° = 0.488 radian
Now, we can express displacement in the form of 'Asin(wt + α)' as:
d = 3.2sin(100πt ± 0.488 )
Answer:
False. Apart from heat loss, there are some other energy loss factors in electric motors.
They are:
(1) Core losses
(2) Windage losses
(3) Eddy Current
(4) Stray Load
Explanation:
STATOR RESISTANCE/HEAT LOSS(Heat loss I^2*R), which is the product of the square of the current multiplied by the resistance of the stator winding. The rotor also experiences I^2*R losses in the squirrel-cage rotor bars, called rotor resistance loss (rotor I^2*R).
CORE LOSSES also occur, originating in the lamination steel. Core losses include hysteresis losses, which result from reorientation of the magnetic field within the motor’s lamination steel, and eddy current losses resulting from electrical currents produced between laminations due to the presence of a changing magnetic field.
These electrical currents occur in both stator and rotor cores, but primarily in the stator, as these losses are proportional to the frequency of the current. The frequency of current in the rotor bars is only a small fraction of the line frequency, as the rotor current frequency is proportional to slip (the difference between operating speed and synchronous speed). Both the stator and rotor laminations have an insulated coating to reduce shorting losses (eddy current) from adjacent laminations.
Friction losses are from the motor bearings and lubrication.
WINDAGE LOSSES combine losses from the rotor spinning in air that creates drag and those from cooling fans used on the motor, along with friction losses in the bearings.
STRAY LOAD losses also are present.