can someone help me, the question is in these two links. there's no space between h and ttps.
h ttps://firebasestorage.googleapis.com/v0/b/crosservice-2dc5b.appspot.com/o/website%2FUser-ZhCUHpR6tchxButyLOfiabDWiQt2-183304-5e7ab4d0cb065.png?alt=media&token=03910b23-1725-4aca-925a-adcba593e5ee
can someone help me on these questions:
For the circuit in the picture above, answer the following questions:
a) Find out Thevenin’s equivalent resistance Rth for the load rheostat viewed from terminals a and b. (6 marks)
b) Determine Thevenin’s equivalent voltage Vth for the load rheostat viewed from terminals a and b by applying Superposition Theorem to two sources, VS and IS. Show your steps of all work with superposition. (12 marks)
c) Determine the resistance value of the rheostat to achieve the maximum power transfer to it, RL_max. Find out the maximum power PL_max. Calculate the voltage on and current through the rheostat at the maximum power, VL_max and IL_max, respectively, and indicate the voltage and current directions by sign in your calculation or by drawing of the circuit.
please help me.
i typed two links by accident, it's only one link
I am not certain what you need, it is straight forward.
a. Figure open circuit voltage Vab. That seems easy...you have V3+V2 equal to Vs Remember V3 has two currents thru it, 20ma + the current due to Vs. Vab= V3
Next, find short circuit current, you have Iab=I2-20mA
given that, you can deduce the Thevelin equivalent directly.
To answer the questions about Thevenin's equivalent resistance, Thevenin's equivalent voltage, and the resistance value of the rheostat, we need to analyze the given circuit.
Here's a step-by-step guide on how to approach each question:
a) Finding Thevenin's equivalent resistance (Rth):
1. Identify the load rheostat.
2. Disconnect the load rheostat from the circuit, leaving behind only the remaining part of the circuit.
3. Calculate the equivalent resistance of the remaining part by simplifying the circuit and combining resistors.
4. The calculated value will be the Thevenin's equivalent resistance (Rth) viewed from terminals a and b.
b) Determining Thevenin's equivalent voltage (Vth) using Superposition Theorem:
1. Apply the Superposition Theorem, which states that you can analyze a linear circuit with multiple sources by considering the contribution of each source independently.
2. First, consider the effect of the source VS alone by disconnecting or "turning off" the source IS.
3. Calculate the voltage across terminals a and b due to the source VS by analyzing the circuit.
4. Then, consider the contribution of the source IS alone by disconnecting or "turning off" the source VS.
5. Calculate the voltage across terminals a and b due to the source IS by analyzing the circuit.
6. Finally, add the voltages obtained from steps 3 and 5. The summed value will be the Thevenin's equivalent voltage (Vth) viewed from terminals a and b.
c) Determining the resistance value of the rheostat for maximum power transfer:
1. Calculate the Thevenin's equivalent resistance (Rth) from question a.
2. To achieve maximum power transfer, the load resistance (RL) must be equal to the Thevenin's equivalent resistance (Rth).
3. Set RL equal to Rth and calculate the resistance value to achieve maximum power transfer, referred to as RL_max.
4. Calculate the maximum power, referred to as PL_max, by substituting RL = RL_max into the power equation (P = V^2 / R).
5. Calculate the voltage (VL_max) across the rheostat and the current (IL_max) flowing through it using Ohm's law (V = I * R).
By following these steps, you should be able to answer all the questions provided.