A long straight wire carrying a current I is in the plane of a square loop of wi
ID: 1566388 • Letter: A
Question
A long straight wire carrying a current I is in the plane of a square loop of wire as shown. Both the loop and the wire are held in place. In what direction does the induced current in the loop flow if the loop moves away from the wire in the direction as shown? a. Clockwise b. Counterclockwise c. Into the paper d. Out of the paper e. There is no induced current An electromagnetic wave of frequency 7.4 times 10^14 Hz travelling through diamond (n = 24) gets refracted out into air (n = 1). What wavelength of light will be seen in air? a. UV with wavelength 305 nm b. Blue with wavelength 405 nm c. Blue-green with wavelength 505 nm d. Infrared with wavelength 805 nm e. Orange-red with wavelength 605 nmExplanation / Answer
17. (a) Cloclwise
18. (b) Blue with wavelength 405 nm. This has been determined by using the relationship between velocity and refractive index of the material.
v=c/n
where v is velocity of light in the medium and n is the refractive index of the material.