Capacitors, Inductors ( finding current and resistance)

Click For Summary
SUMMARY

The discussion focuses on calculating current and resistance in circuits involving capacitors and inductors, specifically using the formulas for inductive reactance (Xl = 2πfL) and capacitive reactance (Xc = 1/(2πfC)). The user successfully calculated Xl and Xc and applied Ohm's Law (I = V/R) to find a current of I = 19. However, confusion arose regarding the circuit configuration and the total reactance, which combines both capacitive and inductive components, leading to ambiguity in interpreting the circuit diagram provided.

PREREQUISITES
  • Understanding of inductive reactance (Xl) and capacitive reactance (Xc)
  • Familiarity with Ohm's Law and its applications
  • Basic knowledge of circuit configurations (series and parallel)
  • Ability to interpret circuit diagrams and identify components
NEXT STEPS
  • Study the principles of series and parallel circuits in depth
  • Learn about complex impedance in AC circuits
  • Explore the use of circuit simulation tools like LTspice for practical applications
  • Review the concept of total reactance and its implications in RLC circuits
USEFUL FOR

Students and professionals in electrical engineering, electronics enthusiasts, and anyone involved in circuit analysis and design, particularly those working with AC circuits and reactive components.

Arty7
Messages
7
Reaction score
0

Homework Statement



Please check the attachment to see all the variables

Homework Equations



Xl=2*pi*f*l, Xc=1/2*pi*f*c, variation of ohms law

The Attempt at a Solution



Ok for 5) i found Xl & Xc, then i combined the resistances in parrallel and used ohms law to find I=v/r. My answer was I=19

For 6) I am complete confused by the circuit, it doesn't make sense to me

For 7) parallel resistor?
 

Attachments

  • Untitled.png
    Untitled.png
    30.2 KB · Views: 490
Physics news on Phys.org
Question 6 is a bit ambiguous. The total reactance of the circuit is made up of a capacitive part and an inductive part. The result Xl - Xc is usually referred to as 'the reactance' qualified by the word 'capacitive' of 'inductive' depending on which is the larger.

Anyway in this case - I think it just means the reactance of the capacitor - which you've already calculated.

Figure 12-2 makes no sense at all. There are 2 capacitors but 3 values given
If we assume that one is missing from the drawing, it's probably the 10uF and it could be in parallel with the others, or in series.
Only one configuration would give a value that's offered as an answer.
 

Similar threads

  • · Replies 10 ·
Replies
10
Views
1K
  • · Replies 9 ·
Replies
9
Views
10K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 15 ·
Replies
15
Views
919
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
3
Views
1K
  • · Replies 42 ·
2
Replies
42
Views
5K
  • · Replies 2 ·
Replies
2
Views
3K
Replies
3
Views
2K