This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A resistor of unknown resistance and a 15-W resistor are connected across a 20-V emf in such a way ... (Read 449 times)

dejastew

  • Hero Member
  • *****
  • Posts: 562
on: Jul 28, 2018
A resistor of unknown resistance and a 15-W resistor are connected across a 20-V emf in such a way that a 2.0 A current is observed in the emf. What is the value of the unknown resistance?
 a. 75 W
  b. 12 W
  c. 7.5 W
  d. 30 W
  e. 5.0 W

Question 2

When a 20-V emf is placed across two resistors in series, a current of 2.0 A is present in each of the resistors. When the same emf is placed across the same two resistors in parallel, the current through the emf is 10 A. What is the magnitude of the greater of the two resistances?
 a. 7.2 W
  b. 7.6 W
  c. 6.9 W
  d. 8.0 W
  e. 2.8 W


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

johnpizzaz

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

A


dejastew

  • Member
  • Posts: 562
Reply 2 on: Jul 28, 2018
Wow, this really help

bimper21

  • Member
  • Posts: 309
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

The explosion of the Maine in Havana harbor, killing 260 men, caused much speculation in the newspap The explosion of the Maine in Havana harbor, killing 260 men, caused much speculation in the newspap
What is the volume of 1.51 x 1024 atoms of an unknown gas at STP? What is the volume of 1.51 x 1024 atoms of an unknown gas at STP?
Combustion analysis of 0.150 g of an unknown compound containing carbon, hydrogen, and oxygen ... Combustion analysis of 0.150 g of an unknown compound containing carbon, hydrogen, and oxygen ...
An aluminum wire has a length of 27.0 m and a resistance of 2.90 n at 20.00C. As An aluminum wire has a length of 27.0 m and a resistance of 2.90 n at 20.00C. As
A reverse-biased silicon diode is connected in series with a 12 V source and a resistor.The ... A reverse-biased silicon diode is connected in series with a 12 V source and a resistor.The ...
Artist’s depiction of the view inside the uterus, showing a fetus connected by an umbilical cord ... Artist’s depiction of the view inside the uterus, showing a fetus connected by an umbilical cord ...
Video: Inflammatory response Animation

For a complete list of videos, visit our video library