A magnet relay is a device used for?
reading the magnitude of magnetic flux
controlling another circuit carrying larger current
turning in sports
storing magnetic field
Correct answer is B
Relays are electrically operated switches that open and close the circuits by receiving electrical signals from outside sources.
When the plate area of a capacitor increases?
the voltage can withstand increase
the capacitance decreases
the capacitance is unaffected
the capacitance increases
Correct answer is D
Therefore, as the area of the plates increase, capacitance increases.
A person standing waist-deep in a swimming pool appears to have short legs because of light?
diffraction
refraction
reflection
interference
Correct answer is B
The refractive index of water is greater than that of air.
So, A person legs appear to be short while standing in the tank due to refraction.
The secondary pigments consist of?
blue, green, and violet
yellow, green, and magenta
magenta, yellow, and cyan
red, green, and blue
Correct answer is C
The primary colors of pigment are red, blue, and green.
Mixing these primary colors of pigment gives us the three secondary colors:
red+blue=magenta, red+ green = yellow, and blue + green = cyan