What is the Power Supplied by the Dependent Current Source?

In summary, the conversation discusses the calculation of power supplied by a dependent current source, where the direction of current is from negative to positive inside the source. The correct calculation is -60 units, as the external polarities are taken in reverse conventionally.
  • #1
J.live
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Homework Statement



In the Figure below if V 1=10 V and i x= -2 A, what is the power supplied by the dependent current source?




Homework Equations





The Attempt at a Solution



The answer is -60. But I am getting 60. whenever It's power supplied doesn't it mean the current is entering from the negative end of the voltage ? like shown in the diagram? So shouldn't the negative signs cancel out? I am really confused.
 

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  • #2
Current flow is caused by electrons. Electrons originate from the negative terminal of a battery. But conventionally, the direction of current is taken in reverse. That is, external to the battery, it's from + to -, or in other words, from - to + inside the battery.

In the question, direction of current is from - to + inside the source. So the given polarities are proper and power delivered = VI= V1 * 3 Ix
= 10 * 3 * -2
= -60 units.
 

FAQ: What is the Power Supplied by the Dependent Current Source?

What is a basic circuit?

A basic circuit is a closed loop of conductive material that allows electricity to flow through it. It consists of a power source, such as a battery or power supply, and components, such as resistors, capacitors, and inductors, connected by conductors, such as wires.

How is power supplied in a basic circuit?

Power is supplied in a basic circuit through the power source, which provides a voltage difference that drives the flow of current through the circuit. This voltage difference is measured in volts and is represented by the symbol V.

What is the difference between AC and DC power in a basic circuit?

AC (alternating current) power changes direction periodically, while DC (direct current) power flows in only one direction. AC power is typically used in household outlets, while DC power is commonly used in electronic devices.

How is power calculated in a basic circuit?

Power in a basic circuit is calculated using the formula P = VI, where P is power in watts, V is voltage in volts, and I is current in amperes. This formula can be used to determine the amount of power supplied by the power source or the power dissipated by a component in the circuit.

Why is it important to understand power supply in a basic circuit?

Understanding power supply in a basic circuit is important because it allows us to design and troubleshoot circuits effectively. By understanding how power is supplied and how it affects the components in a circuit, we can ensure that the circuit functions properly and avoid any potential hazards or malfunctions.

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