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
Butoxors [25]
3 years ago
6

Solve the current and voltage problems for the ci

Physics
2 answers:
Korvikt [17]3 years ago
6 0

Explanation:

Each resistor has a resistance of R.

In the first problem, each row of three resistors in series has a resistance or 3R.

A₂ = 4A, so the voltage drop across the rows is:

V = IR

V = (4)(3R)

V = 12R

The voltage drop equals the voltage gain (Kirchoff's voltage law).  The battery has a voltage of 9V, so:

9 = 12R

R = 0.75 Ω

The three rows are in parallel with each other, so the total resistance is:

∑R = (1/(3R) + 1/(3R) + 1/(3R))⁻¹

∑R = R

∑R = 0.75 Ω

The current A₁ can be found with Ohm's law:

V = IR

9 = (A₁) (0.75)

A₁ = 12 A

Using Ohm's law to find V₁, V₂, and V₃:

V = IR

V₁ = (4)(0.75)

V₁ = 3V

V₂ = (4)(2×0.75)

V₂ = 6 V

V₃ = (4)(3×0.75)

V₃ = 9 V

In the second problem, all the resistors are in series.  So the total resistance is:

∑R = 8R

The battery voltage is 16V, and A₂ = 6A.  So using Ohm's law:

V = IR

16 = (6)(8R)

R = 1/3 Ω

Since there's only one loop, the current is the same at all points.  So A₁ = A₂ = 6A.

Using Ohm's law to find each voltage:

V = IR

V₁ = (6)(1/3)

V₁ = 2V

V₂ = (6)(2×1/3)

V₂ = 4 V

V₃ = (6)(4×1/3)

V₃ = 8 V

V₄ = (6)(2×1/3)

V₄ = 4 V

inna [77]3 years ago
5 0

For the circuit shown in the left side of the image, A₁=12A, V₁=3V, V₂=6V, and V₃=9V.

The voltage source is Vs = 3(3V) = 9V is connected in parallel to the three branches that each contain three equals light bulbs, the three branches are in parallel meaning that the voltage in each branch is 9V.

The current through one branch is A₂ = 4A, we can calculate the equivalent resistance in that branch using Ohm's Law:  

Req = V/I, where I = A₂ = 4A

Req = 9V/4A = 2.25Ω

We can calculate the resistance in each light bulb, there are three light bulb in each branch that have a equivalent resistance of 2.25Ω, the light bulbs are in serie, so:

Req = R + R + R = 3R

The resistance of each light bulb is R = Req/3 = 2.25Ω/3 = 0.75Ω

To calculate V₁, using Ohm's Law:

V₁ = I R = (4A)(0.75Ω) = 3V

Then, the other branches are in parallel and it has the same amount of light bulbs and the same characteristics, each branch has a equivalent resistance of 2.25Ω, and each light bulb has a resistance of 0.75Ω.

To calculate V₂ and V₃:

We know that the voltage in each branch is 9V, each light bulb has a drop of voltage of 3V. So, the total voltage in one branch is the sum of each drop of voltage on each light bulb Vt = 3V + 3V + 3V = 9V.

V₂ = 3V + 3V = 6v

v₃ = Vt = 3V + 3V + 3V = 9V

To calculate the total current A₁ through the circuit, we know that the current through each branch is 4A, the total current A₁ is:

A₁ = 3A₂ = 3(4A) = 12A

For the circuit shown in the right side of the image, A₁=A₂=6A, V₁=2V, V₂=V₄=4V, and V₃=8V.

The voltage source is Vs = 4(-4V) = -16V connected in series with 8 light bulbs, the current flow through each light bulb, It= A₁ = A₂ = 6A. The voltage source is Vs= -16V, the '-' means that the current flows in the opposite direction.

To calculate the equivalent resistance of the circuit, using Ohm's Law:

Req = Vs/It = 16V/6A = 2.67Ω

The resistance of each light bulb is R = Req/8 = 2.67Ω/8 = 0.33Ω

The drop of voltage on each light bulb is:

V = It R = (6A)(0.33Ω) = 2V

V₁ = 2V

V₂ = V₄ = 2(2V) = 4V

V₃ = 4(2V) = 8V

You might be interested in
Sam lifted his backpack with 5 Newtons of force a total of 400
irga5000 [103]

2000joules

Explanation:

work done=force×meters

4 0
3 years ago
A mass of 10 g of oxygen fill a weighted piston–cylinder device at 20 kPa and 110°C. The device is now cooled until the tempe
mezya [45]

Answer:

The change of the volume of the device during this cooling is 14.3\times10^{-3}\ m^3

Explanation:

Given that,

Mass of oxygen = 10 g

Pressure = 20 kPa

Initial temperature = 110°C

Final temperature = 0°C

We need to calculate the change of the volume of the device during this cooling

Using formula of change volume

\Delta V=V_{2}-V_{1}

\Delta V=\dfrac{mR}{P}(T_{2}-T_{1})

Put the value into the formula

\Delta V=\dfrac{0.3125\times0.0821}{2.0265\times10^{9}}(383-273)

\Delta V=14.297\ L

\Delta V=14.3\times10^{-3}\ m^3

Hence, The change of the volume of the device during this cooling is 14.3\times10^{-3}\ m^3

6 0
3 years ago
I need someone smart!
Ivanshal [37]

Answer:

If we are looking for evidence of something that exists outside of our visible Universe and leaves no trace within it, it seems that the idea of a Multiverse is fundamentally untestable.  But there are all sorts of things that we cannot observe that we know must be true. Decades before we directly detected gravitational waves, we knew that they must exist, because we observed their effects.

Explanation:

Maybe helps lol

5 0
2 years ago
Read 2 more answers
if a man hits a golf ball (0.2 kg) which accelerates at a rate of 20 m/s squared. what amount of force acted on the ball?
kkurt [141]

F = ma

We have mass = 0.2kg

and acceleration = 20 m/s^2

So..

F = (0.2)(20)

F = 4 N

6 0
3 years ago
1. A student moves a box of books down the hall by pulling on a rope attached to the box. The student
Lelechka [254]

Answer:

the value of the uk is 400kg

Explanation:

5 0
2 years ago
Other questions:
  • By means of a rope whose mass is negligible, two blocks are suspended over a pulley, as the drawing shows. The pulley can be tre
    11·1 answer
  • What is the difference between reflection and refraction
    5·1 answer
  • How much kinetic energy does a 6kg cart have when moving at 4 m/s?
    13·1 answer
  • Think about your displacement at three different times throughout your day and compare it with e distance you traveled. (6 point
    15·1 answer
  • Why is object 2 accelerating while object 1 remains stationary?
    10·1 answer
  • a student pushes on a crate with a force of 100 N directed to the right. what force does the crate exert on a student
    13·1 answer
  • A car uses ____________________________ to move. Select one: a. energy b. pulls c. motion d. work
    15·1 answer
  • From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a frequ
    15·1 answer
  • Convertir:<br> A. 3Km a m<br> B. 250 ma Km<br> C. 1000Cm a m<br> D. 10000 mm a Cm
    6·1 answer
  • Does everything in a black hole contain a singularity?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!