A diverging lens has a focal length of- 40 cm. A virtual image is formed at a distance of 30 cm from the lens, on the same side as the object.(Hint: you have to take q = -30 cm because of the virtual image.) 29. Find the object distance. a. -120 cm b. -17.14 cm c. 17.14 cm d. 120 cm 30. find the magnification of the lens. a. 0.25 of b. -0.25 c. 4.0 d. 1.75
A diverging lens has a focal length of- 40 cm. A virtual image is formed at a distance of 30 cm from the lens, on the same side as the object.(Hint: you have to take q = -30 cm because of the virtual image.) 29. Find the object distance. a. -120 cm b. -17.14 cm c. 17.14 cm d. 120 cm 30. find the magnification of the lens. a. 0.25 of b. -0.25 c. 4.0 d. 1.75
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A diverging lens has a focal length of - 40 cm. A virtual image is formed at a distance of 30 cm from
the lens, on the same side as the object.(Hint: you have to take q = -30 cm because of the virtual
image.)
29. Find the object distance.
а. —120 cm
b. -17.14 cm
с. 17.14 ст
d. 120 cm
30. find the magnification of the lens.
of
d. 1.75
а. 0.25
b. --0.25
с. 4.0
A very long non-conducting wire with radius R is charged uniformly with volume charge density of p.
31. Use the Gauss Law to find the electric field inside the wire. (r<e)
b. pr/2ɛ.
d. pR/3ɛ,r?
a. pr/3ɛ.
C: pR?/2ɛ,r
e. 4pR/3ɛ,r?
32. Use the Gauss Law to find the electric field outside the wire.
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