Both the answers from "Big D" and "N9KXF" are correct, but not complete. There is one aspect that needs to be remembered for AC power - the phase relationship between the voltage and current.
<span>For AC power, the more complete equation for power is P = V * I * cosx, where x is the phase angle between voltage and current. </span>
<span>If the phase angle between voltage and current is 90 degrees, then even though current may be flowing, the total power over a cycle would be zero. Reactive elements like inductors and capacitors have a 90degree phase relationship between voltage and current. They do not "dissipate" energy. They store energy and give it back during different parts of the AC cycle. </span>
Answer:
Wavelength of the light is 750 nm.
Explanation:
Given that,
Spacing between the lines,
Order of the grating, n = 2
The second order is formed at an angle of 48.5°. The equation of diffraction grating is given by :
or
So, the wavelength of the light is 750 nm. Hence, this is the required solution.
Explanation:
It is given that,
Diameter of the circular loop, d = 1.5 cm
Radius of the circular loop, r = 0.0075 m
Magnetic field,
(A) We need to find the current in the loop. The magnetic field in a circular loop is given by :
I = 32.22 A
(b) The magnetic field on a current carrying wire is given by :
r = 0.00238 m
Hence, this is the required solution.
Answer:
2.0
Explanation:
i think 2.0 because u are trying find the magnitude of it
Answer:
Frequency
Explanation:
A period is the number of revolutions in a minute.
Also, frequency can be defined as number of oscillation per unit time.
Mathematically, frequency is given by the formula;
Thus, we can deduce that frequency of an oscillation is the inverse of the period (time) of oscillation.
Mathematically, period is expressed as;
This ultimately implies that, an object's period of oscillation can always be used to solve for frequency.