Help with Basic Circuits: i1, i2, i, V1, R, Power

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In summary: Now you can work on the next problem.In summary, the conversation is about a student asking for help on a homework problem related to finding the value of i, power supplied by a dependent voltage source, and the resistance (R) given different voltages and power values. The expert advises the student to show their attempt at the solution using KCL or KVL equations and offers to provide tutorial help. The student is also reminded not to ask for direct solutions to homework problems.
  • #1
Imposta
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My teacher has been absent most of the semester and the substiute hasn't been much help so I was wondering if you guys could help me out. Thanks

1. Find i1 and i2.
attachment.php?attachmentid=20979&stc=1&d=1254887607.jpg


2. (a) Determine the value of i.
(b) Find the power supplied by the dependent voltage source.

attachment.php?attachmentid=20980&stc=1&d=1254887607.jpg


3. (a) Find R if V1=30 V.
(b) Find R if power supplied by the current source is 1575 W.

attachment.php?attachmentid=20981&stc=1&d=1254887607.jpg
 

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  • #2
Imposta said:
My teacher has been absent most of the semester and the substiute hasn't been much help so I was wondering if you guys could help me out. Thanks

1. Find i1 and i2.
attachment.php?attachmentid=20979&stc=1&d=1254887607.jpg


2. (a) Determine the value of i.
(b) Find the power supplied by the dependent voltage source.

attachment.php?attachmentid=20980&stc=1&d=1254887607.jpg


3. (a) Find R if V1=30 V.
(b) Find R if power supplied by the current source is 1575 W.

attachment.php?attachmentid=20981&stc=1&d=1254887607.jpg

It doesn't matter if your teacher is AWOL. You know how to use wikipedia and other learning resouces on the Internet. We do not do your homework for you here at the PF. Show us your KCL or KVL equations as an attempt at the solution. Then we can offer tutorial help if you have problems.
 
  • #3
Did you read the bit above where it says not to put homework here?

The second and third question are at a much higher level than the first one, so I have to wonder if you really couldn't do even the first one?

Without doing it for you,
What is 3 ohms in series with 3 ohms?

What is the result of putting 3 ohms across this combination?

What is the result of putting 4 ohms in series with this combination?

Now put 36 volts across the whole set of resistors and what current flows?

How much voltage is there across the 4 ohm resistor?

How much voltage is across the combination of 3 ohm resistors?

So, how much current is flowing in the single 3 ohm resistor?

How much is flowing in the series 3 ohm resistors?
 

What is a basic circuit?

A basic circuit is a closed loop path through which electricity flows. It consists of a power source, such as a battery, a load, such as a light bulb, and connecting wires.

How do you calculate current (I) in a circuit?

You can calculate current by dividing the voltage (V) by the resistance (R), using the formula I = V/R. Alternatively, if you know the power (P) and voltage (V), you can use the formula I = P/V.

What is the difference between i1 and i2 in a circuit?

i1 and i2 refer to the current flowing through different branches in a circuit. In a parallel circuit, the total current (i) splits into multiple branches, with i1 and i2 representing the current in each branch. In a series circuit, the current remains constant throughout, so i1 and i2 would be the same.

How do you calculate voltage (V) in a circuit?

You can calculate voltage by multiplying the current (I) by the resistance (R), using the formula V = I x R. Alternatively, if you know the power (P) and current (I), you can use the formula V = P/I.

Why is it important to understand circuit power?

Circuit power is important because it helps us understand how much energy is being used and how the components in a circuit are functioning. It also allows us to make calculations and predictions about the behavior of a circuit.

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