A circuit consists of three identical lamps connected to a battery as in Figure OQ28.14. The battery has some internal resistance. The switch S, originally open, is closed. (i) What then happens to the brightness of lamp B? (a) It increases. (b) It decreases somewhat. (c) It does not change. (d) It drops to zero. For parts (ii) to (vi), choose from the same possibilities (a) through (d). (ii) What happens to the brightness of lamp C? (iii) What happens to the current in the battery? (iv) What happens to the potential difference across lamp A? (v) What happens to the potential difference across lamp C ? (vi) What happens to the total power delivered to the lamps by the battery?
A circuit consists of three identical lamps connected to a battery as in Figure OQ28.14. The battery has some internal resistance. The switch S, originally open, is closed. (i) What then happens to the brightness of lamp B? (a) It increases. (b) It decreases somewhat. (c) It does not change. (d) It drops to zero. For parts (ii) to (vi), choose from the same possibilities (a) through (d). (ii) What happens to the brightness of lamp C? (iii) What happens to the current in the battery? (iv) What happens to the potential difference across lamp A? (v) What happens to the potential difference across lamp C ? (vi) What happens to the total power delivered to the lamps by the battery?
Solution Summary: The author explains that when the switch is opened, the current is completing its path by flowing through lamp A, Lamp B, and Lamp C.
A circuit consists of three identical lamps connected to a battery as in Figure OQ28.14. The battery has some internal resistance. The switch S, originally open, is closed. (i) What then happens to the brightness of lamp B? (a) It increases. (b) It decreases somewhat. (c) It does not change. (d) It drops to zero. For parts (ii) to (vi), choose from the same possibilities (a) through (d). (ii) What happens to the brightness of lamp C? (iii) What happens to the current in the battery? (iv) What happens to the potential difference across lamp A? (v) What happens to the potential difference across lamp C? (vi) What happens to the total power delivered to the lamps by the battery?
You connect a battery, resistor, and a capacitor as in figure 1, where R= 15.0 ohms and C= 5.00x10^-6 F. The switch S is closed at t=0. When the current in the circuit has magnitude 3.00 A, the charge on the capacitor is 40.0x10^-6 C. (A) what is the emf of the battery? (B) at what time t after the switch is closed is the charge on the capacitor equal to 40.0x10^-6? (C) when the current has magnitude 3.00 A, at what rate is the energy being stored in the capacitor? (D) when the current has magnitude 3.00 A, at what rate is energy being supplied by the battery?
The circuit in Figure P18.62 contains two resistors, R1 = 2.0kΩ and R2 = 3.0 kΩ, and two capacitors, C1 = 2.0 µF and C2 =3.0 µF, connected to a battery with emf ε = 120 V. If there areno charges on the capacitors before switch S is closed, determinethe charges q1 and q2 on capacitors C1 and C2, respectively,as functions of time, after the switch is closed. Hint: Firstreconstruct the circuit so that it becomes a simple RC circuitcontaining a single resistor and single capacitor in series, connectedto the battery, and then determine the total charge qstored in the circuit.
An uncharged capacitor and a resistor are connected in series to a battery as shown in Figure, where e= 12.0 V, C = 5.00 mF, and R = 8.00 × 105 W. The switch is thrown to position
a. Find the time constant of the circuit, the maximum charge on the capacitor, the maximum current in the circuit, and the charge and current as functions of time.
Chapter 28 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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