/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q73P Consider the circuit shown in Fi... [FREE SOLUTION] | 91影视

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Chapter 4: Q73P (page 846)

Consider the circuit shown in Fig. P25.73. The emf source has negligible internal resistance. The resistors have resistances R1=6.00惟and R2=4.00惟. The capacitor has capacitance C=9.00渭F. When the capacitor is fully charged, the magnitude of the charge on its plates is Q=36.00渭C. Calculate the emf蔚.

Short Answer

Expert verified

The emf 蔚is 6.67 V

Step by step solution

01

Determine the formula to find the emf

The voltage drop in the circuit is due to the external resistors R1andR2 and from Ohm鈥檚 law the emf of the battery is

蔚=IR1+R2

Now, the capacitor and resistance R1are in parallel, thus they have the same voltage, thus, the voltage is

V=QC=369V=4V

02

Determine the emf

Now, the current in the circuit is

I=VR1=46I=0.667A

So,

鈭�=0.667A6+4鈭�=6.67V

Therefore, the emf 蔚is 6.7 V

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Most popular questions from this chapter

When switch Sin Fig. E25.29 is open, the voltmeter V reads 3.08 V. When the switch is closed, the voltmeter reading drops to 2.97 V, and the ammeter A reads 1.65 A. Find the emf, the internal resistance of the battery, and the circuit resistance R. Assume that the two meters are ideal, so they don鈥檛 affect the circuit.

Fig. E25.29.

Light Bulbs in Series and in Parallel. Two light bulbs have constant resistances of 400惟and 800惟. If the two light bulbs are connected in series across a 120Vline, find (a) the current through each bulb; (b) the power dissipated in each bulb; (c) the total power dissipated in both bulbs. The two light bulbs are now connected in parallel across the120Vline. Find (d) the current through each bulb; (e) the power dissipated in each bulb; (f) the total power dissipated in both bulbs. (g) In each situation, which of the two bulbs glows the brightest? (h) In which situation is there a greater total light output from both bulbs combined?

A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 3.90 碌C. (a) What is the potential difference between the plates? (b) If the charge is kept constant, what will be the potential difference if the plate separation is doubled? (c) How much work is required to double the separation?

In an L-R-C series circuit, what criteria could be used to decide whether the system is over damped or underdamped? For example, could we compare the maximum energy stored during one cycle to the energy dissipated during one cycle? Explain.

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