Two 1.50-V batteries—with their positive terminals in the same direction—are inserted in series into a flashlight. One battery has an internal resistance of 0.255 Ω, and the other has an internal resistance of 0.153 Ω. When the switch is closed, the bulb carries a current of 600 mA. (a) What is the bulbs resistance? (b) What fraction of the chemical energy transformed appears as internal energy in the batteries?

> Lightbulb A is marked "60.0 W 120 V," and lightbulb B is marked "100 W 120 V." These labels mean that each lightbulb has its respective power delivered to it when it is connected to a constant 120-V source. (a) Find the resistance of each lightbulb. Ω RA RB Ω = (b) During what time interval does 1.20 C pass into lightbulb A? S (c) Is this charge different upon its exit versus its entry into the lightbulb? Yes No Explain. This answer has not been graded yet. (d) In what time interval does 1.40 J pass into lightbulb A? S (e) By what mechanisms does this energy enter and exit the lightbulb? Explain. This answer has not been graded yet. (f) Find the cost of running lightbulb A continuously for 30.0 days, assuming the electric company sells its product at $0.110 per kWh. (

Consider the network of four resistors shown in the diagram, where R1 = 1 Ω, R2 = 5 Ω, R3 =2Ω,andR4 =6Ω. . The resistors are connected to a battery with an emf V. (a) What is the current flowing out of the battery if the emf is 12 V? (B) What is the voltage difference across the resistor R1? (C) What is the rate of Ohmic dissipation for resistor R2?

Three resistors with values of 60 Q, 30 Q, and 20 Q, respectively, are connected in series to a 110 V battery of negligible internal resistance. Draw a circuit diagram and find the (a) equivalent resistance of the combined resistors. (b) current flowing through each resistor, A (C) voltage drop across each resistor, and 60 Q: V 30 Ω: V 20 0: V (d) the power dissipated by each resistor. 60 Q: 30 Ω 20 0: W

Consider the circuit shown that has two resistors (each with resistance R = 8.00 Q), a battery with negligible internal resistance (V= 12.0 V), and a lightbulb. If the resistance of the lightbulb is 3.50 Q, calculate the power output of the lightbulb (ie. the rate at which energy is dissipated in the lightbulb). R R 12 W 2.2 W 6.8 W 4.0 W

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In the circuit shown in the figure, the S switch closed at t=0 and the capacitors, which are completely empty, begin to fill. Here ε=10 V, C=5 μF and R=55 Ω. What is the time constant of the circuit, τ, in units of microseconds? When t= τ, what is the total charge, in units of microcoulomb, accumulated in the capacitors?

An unknown resistor is connected between the terminal of a 3.00 V battery. The power dissipated in the resistor is 0.540 W. The same resistor is then connected between the terminals of a 1.50 V battery. What power is dissipated in this case?

Three resistors with values of 60.00, 30.00 and 20.0Q, respectively, are connected in parallel to a 110.0V of a negligible internal resistance. Draw the circuit diagram and find the (a) equivalent resistance of the combined resistors, (b) current flowing through each resistor, (c) voltage across each resistor, and (d) the power dissipated by each resistor.