A rectangular loop of wire has dimensions (d⋅l) as shown in (Figure 4). The loop is moving to the right at a constant speed v into a uniform magnetic field of magnitude B, directed into the page.

The magnitude of the emf induced in the loop is Bvd.

Horizontal side = l

Vertical side = d

The induced emf at frame 700 is -26mV. The instantaneous speed at frame 700 is 6.0×10^−2 m/s.

Based on the emf value measured at frame 700, what is the average magnitude of the magnetic field inside the magnet assembly? Note that the loop has 10 turns; in other words, the total emf is the sum of the emf’s generated in each turn. In your calculations, use 26 mV for the magnitude of the total induced emf and 0.060 m/s for the speed of the loop.

temp rises, and expansion

its c i just checked it

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.

i think its c if i'm wrong