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23 Nov 2019

Using appropriate laws of DC, investigate the circuit thatconsists of a power supply with emf and internal resistanceconnected to a variable resistor as shown in the diagrambelow.Using appropriate laws of DC, investigate the circuit thatconsists of a power supply with emf and internal resistanceconnected to a variable resistor as shown in the diagrambelow.

For this investigation let E= 15 V, r= 2.5 ohm

1. Derive/show the equations for the current I, the terminalvoltage V, and electric power P in terms of E, R, and r.

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

The circuit in the diagram consists of a battery with EMF , a resistor with resistance R and an ammeter and voltmeter. The voltmeter and ammeter can be considered as ideal that is their resistances are infinity and zero respectively. The current in the resistor is I and the voltage is V. The internal resistance of battery is not zero.

A) What is the ammeter Reading I? Express your answer in terms of E, R, and rint.

B) What is the voltmeter reading V? Express your answer in terms of E, R, and rint.

C) What is the power PR dissipated in the resistor? Express your answer in terms of I and V.

D) Again, what is the power PR dissipated in the resistor? This time, express your answer in terms of one or more of the following variables: I, rint, and R.

E) What is the total power Ptotal dissipated in the resistive elements of the circuit, in terms of the EMF E of the battery and the current in the circuit? Express your answer in terms of E and the ammeter current I.

To understand how to compute power dissipation in a resistive circuit. (Figure 1)The circuit in the diagram consists of a battery with EMF, a resistor with resistance R, an ammeter, and a voltmeter. The voltmeter and the ammeter (labeled V and A) can be considered ideal; that is, their resistances are infinity and zero, respectively. The current in the resistor is I, and the voltage across it is V The internal resistance of the battery rint is not zero. figure 

A) What is the ammeter Reading I? Express your answer in terms of E, R, and rint.

B) What is the voltmeter reading V? Express your answer in terms of E, R, and rint.

C) What is the power PR dissipated in the resistor? Express your answer in terms of I and V.

D) What is the total power Ptotal dissipated in the resistive elements of the circuit? Express your answer in terms of one or more of the following variables: E, rint, and R.

To understand how to compute power dissipation in a resistive circuit.

(Figure 1) The circuit in the diagram consists of a battery with EMF E, a resistor with resistance R, an ammeter, and a voltmeter. The voltmeter and the ammeter (labeled V and A) can be considered ideal; that is, their resistances are infinity and zero, respectively. The current in the resistor is I, and the voltage across it is V. The internal resistance of the battery rint is not zero.

Part A. What is the ammeter reading I? Express your answer in terms of Δ, R, and rint.

Part B. What is the voltmeter reading V? Express your answer in terms of Δ, R, and rint.

In the following parts, you will express the power dissipated in the resistor of resistance R using three different sets of variables.

Part C. What is the power PR dissipated in the resistor? Express your answer in terms of I and V.

Part D. Again, what is the power PR dissipated in the resistor? This time, express your answer in terms of one or more of the following variables: I, rint, and R.

Part E. For the third time, what is the power PR dissipated in the resistor? Express your answer in terms of one or more of the following variables: Δ, rint, and R.

Part F. What is the total power Ptotal dissipated in the resistive elements of the circuit? Express your answer in terms of one or more of the following variables: Δ, rint, and R.

Part G. What is the total power Ptotal dissipated in the resistive elements of the circuit, in terms of the EMF Δ of the battery and the current in the circuit? Express your answer in terms of Δ and the ammeter current I.

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