This topic contains a solution. Click here to go to the answer

Author Question: The magnification M = -di/do is the ratio of image to object A) angular size. B) distance. C) ... (Read 70 times)

shenderson6

  • Hero Member
  • *****
  • Posts: 573
The magnification M = -di/do is the ratio of image to object
 
  A) angular size.
  B) distance.
  C) focal distances.
  D) heights.

Question 2

A lightbulb is plugged into a household outlet, and one of the wires leading to it is wound into a coil. Now a slug of iron is slid into the coil. What effect will this have?
 
  A) The lamp will dim because energy will now be dissipated in the iron.
  B) The lamp will get brighter because there will be an induced emf that will drive more current through the lamp.
  C) The lamp will dim because a back emf will be produced by the coil, and this will reduce the current flowing in the coil and the lamp.
  D) This will have no effect on the brightness of the lamp.
  E) This will not affect the lamp's brightness because the coil will shift the phase, but not the magnitude, of the current through the lamp.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sarajane1989

  • Sr. Member
  • ****
  • Posts: 296
Answer to Question 1

B

Answer to Question 2

C




shenderson6

  • Member
  • Posts: 573
Reply 2 on: Jul 27, 2018
:D TYSM


cassie_ragen

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

Did you know?

The human body produces and destroys 15 million blood cells every second.

For a complete list of videos, visit our video library