1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kumpel [21]
3 years ago
8

(1 point) Unknown resistor in voltage divider Suppose that a power supply is connected across two resistors R1 and R2 that are c

onnected in series. The power supply voltage E, the voltage across the second resistor V2, and the first resistance R1 are all known, but R2 is not known. Find an expression for R2 in terms of E,R1,andV2
Physics
1 answer:
just olya [345]3 years ago
5 0

Answer:

R₂ = V₂R₁/(E + V₂)

Explanation:

By voltage divider, V₂ = ER₂/(R₁ + R₂)

So, cross-multiplying, we have

V₂(R₁ + R₂) = ER₂

expanding the bracket, we have

V₂R₁ + V₂R₂ = ER₂

collecting like terms, we have

V₂R₁ = ER₂ + V₂R₂

factorizing, we have

V₂R₁ = (E + V₂)R₂

dividing through by (E + V₂), we have

R₂ = V₂R₁/(E + V₂)

You might be interested in
The fact that some well-known studies have been repeated without finding results consistent with those in the initial report des
ValentinkaMS [17]

Answer:

Replication Crisis

Explanation:

Replication crisis in psychology- It refers to the concerns about credibility of finding the results in psychological science.

6 0
2 years ago
a length 650 cm of thin thread wraps around a cylinder exactly 30 times calculate the circumference and the radius of the cylind
Eduardwww [97]

Answer:

circumference= 65/3  cm = 21.67 cm

radius R = 3.45 cm

Explanation:

To calculate the length of the circumference of the cylinder, we divide 650 cm by 30 (the number of times it wrapped exactly around it)

length of circumference= 65/3  cm = 21.67 cm

now use the formula of the circumference length to find the radius (R):

circumference length = 2 * pi * R

65/3 = 2 * pi * R

R = 65 / (6 pi)

R = 3.45 cm

5 0
3 years ago
I am pretty sure its the last one.
CaHeK987 [17]
The answer is has no moons. Mars has two moons
4 0
3 years ago
Read 2 more answers
Which one is made up of one or more molecules?
djverab [1.8K]
Atoms are made up or one or more molecules
8 0
3 years ago
Read 2 more answers
A square loop of wire lies in the x, y plane with opposite corners at (0, 0) and (a, a). The loop carries a current I directed t
Ket [755]

Answer:

Please refer to the figure.

Explanation:

The magnitude of the magnetic field can be found by Biot-Savart Law. We should divide the loop into four components. Each component has a similar solution but their directions are quite different.

The directions can be found by right-hand rule. Point your index finger into the direction of current, point your middle finger towards the target point (0,0,a). Your thumb will show you the direction of magnetic field.

5 0
3 years ago
Other questions:
  • Phases of the moon. Help!???????
    13·1 answer
  • 4. Susan observed that different kinds and amounts of fossils were present in a cliff behind her house. She wondered why changes
    5·2 answers
  • A circuit contains a resistor in series with a capacitor, the series combination being connected across the terminals of a batte
    13·1 answer
  • A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of ma
    14·1 answer
  • - 4x4 – 13x3 + 8x2 – 21x + 18 is divided by 2 – 3?
    13·2 answers
  • What is the difference between a mechanical wave and an electromagnetic wave?
    5·1 answer
  • What is the velocity of a jet that travels 785 m [W] in 2.39 s?
    7·1 answer
  • A kayak took 5 hours to finish its trip on a river. If it traveled at an
    6·1 answer
  • Check all true statements about nonmetals. Group of answer choices
    7·1 answer
  • A car moving at a speed of 20 m/s has a kinetic energy of 200,000 J from that motion. What is the car's mass?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!