Author Question: The length of a certain wire is kept same while its radius is doubled. What is the new resistivity ... (Read 73 times)

captainjonesify

  • Hero Member
  • *****
  • Posts: 543
The length of a certain wire is kept same while its radius is doubled. What is the new resistivity of this wire?
 
  A) It is increased by a factor of 2.
  B) It is increased by a factor of 4.
  C) It is reduced by a factor of 2.
  D) It is reduced by a factor of 4.
  E) It does not change.

Question 2

Two beams of coherent light start out at the same point in phase and travel different paths to arrive at point P. If the maximum destructive interference is to occur at point P, the two beams must travel paths that differ by
 
  A) a whole number of wavelengths.
  B) an odd number of half-wavelengths.
  C) a whole number of half-wavelengths.



BUTTHOL369

  • Sr. Member
  • ****
  • Posts: 341
Answer to Question 1

E

Answer to Question 2

B



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

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?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

For a complete list of videos, visit our video library