Constructive interference means that the waves combine instead of negate. if they are both amplitude x, adding them together would result in 2x, or doubling the amplitude of one of the waves
Answer:
The magnitude of magnetic flux is 0.849 Wb.
Explanation:
Given that,
Number of turns in a coil, N = 290
Radius of the coil, r = 11.5 cm
Magnetic field, B = 0.0705 T
The magnetic field is directed perpendicular to the plane of the coil. The magnetic flux is given by :
So, the magnitude of magnetic flux is 0.849 Wb.
You could easily help yourSELF if you simply follow the instructions in the question and "Use Ohm's law" to calculate the resistance.
Ohm's Law: Resistance = (voltage) / (current)
Resistance = (10 v) / (5 A)
<em>Resistance = 2 ohms</em>
Answer:
80mm or 8cm
Explanation:
According to the lens formula,
1/f = 1/u+1/v
If the object distance u = 4cm = 40mm
Object height = 1.5mm
Image height = 3mm
First, we need to get the image distance (v) using the magnification formula Magnification = image distance/object distance = Image height/object height
v/40=3/1.5
1.5v = 120
v = 120/1.5
v = 80mm
The image distance is 80mm
To get the focal length, we will substitute the image distance and the object distance in the mirror formula to have;
1/f = 1/40+1/-80
Note that the image formed by the lens is an upright image (virtual), therefore the image distance will be negative.
Also the focal length of the converging lens is positive. Our formula will become;
1/f = 1/40-1/80
1/f = 2-1/80
1/f = 1/80
f = 80mm
The focal length of the lens 80mm or 8cm
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