Calculate Unknown Emf Value | Power Dissipation

Thread starter phykon
Start date Jul 2, 2010
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Power

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SUMMARY

The discussion focuses on calculating the unknown electromotive force (emf) in a circuit by summing the power dissipations between two points, A and B. Participants emphasize using the formula I²R for resistors and I*V for voltage sources, while also noting the importance of sign conventions in determining voltage drops and gains. The method outlined is essential for accurately assessing the total emf in the circuit.

PREREQUISITES

Understanding of Ohm's Law and power calculations
Familiarity with circuit analysis techniques
Knowledge of voltage source sign conventions
Basic proficiency in interpreting circuit diagrams

NEXT STEPS

Study Kirchhoff's Voltage Law for circuit analysis
Learn about series and parallel resistor configurations
Explore advanced circuit simulation tools like LTspice
Investigate the impact of load resistance on emf calculations

USEFUL FOR

Electrical engineering students, circuit designers, and hobbyists interested in understanding and calculating emf values in electrical circuits.

Jul 2, 2010

phykon

What is the value of unknown emf in this pic please help me?[PLAIN]http://www.atiani.com/int.gif

Last edited by a moderator: May 4, 2017

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Jul 3, 2010

dighn

just sum up the power dissipations from a to b, for resistors use I^2*R, for voltage sources use I*V and pay attention to the sign of of the source (a drop in the direction of I is +V, gain -V).