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 425 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
Great answer, keep it coming :)

bitingbit

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

A track inside an ignition coil is not a short, but rather it is a low-resistance path or hole that ... A track inside an ignition coil is not a short, but rather it is a low-resistance path or hole that ...
A schematic showing that an inertia switch is connected in series between the fuel-pump relay and ... A schematic showing that an inertia switch is connected in series between the fuel-pump relay and ...
The throttle pedal is connected to the accelerator pedal position (APP) sensor. The electronic ... The throttle pedal is connected to the accelerator pedal position (APP) sensor. The electronic ...
Connections and settings necessary to measure fuel-injector resistance. Connections and settings necessary to measure fuel-injector resistance.
Find the voltage, current and power for each resistor in the circuit below Find the voltage, current and power for each resistor in the circuit below
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
Video: Introduction to Insulin

For a complete list of videos, visit our video library