A loop circuit has a resistance of R1 and a current of 1.9 A. The current is reduced to 1.6 A when an additional 4.8 Ω resistor is added in series with R1. What is the value of R1? Assume the internal resistance of the source of emf is zero. Answer in units of Ω.

A series circuit has two resistors with values R1 = 7.0 Ω and R2 = 2.0 Ω. If the potential of the circuit is 10.0 V, what is the current through R1?

An RC series circuit has a time constant of 40.0ms. When the switch is closed to charge the 50.0 µF capacitor, the initial current is 65.0 mA. What is the potential difference across the capacitor at a time 20.0 ms after closing the switch? Select one O a 12.9 b. 25.0 V O c 14.5 V O d 11.5 V e 20.5 V

Consider the circuit shown below. The resistor has R= 40 ohms and the capacitor has C= 6 x10^-6 F. Initially the switch is open and there is no charge on the capacitor and no current in the resistor. At a time after the switch is closed the current in the resistor is 2 A and the charge on the capacitor is q= +3.00 x 10^-4 C. What is the emf of the battery?

An initially uncharged 3.31 × 10-6 F capacitor and a 8430 № resistor are connected in series to a 1.50 V battery that has negligible internal resistance. What is the initial current Io in the circuit? Calculate the circuit's time constant t. How much time t must elapse from the closing of the circuit for the current to decrease to 3.53% of its initial value? Io = T = t = A S S

An RC circuit has an unknown resistance and an initially uncharged capacitor of 515 x 10^-6 F. When connected to a source potential, it takes the capacitor 25.5 s to become 90% fully charged. What is the resistance of the circuit? Enter a number rounded to the nearest 100 place.

The emf in the circuit shown in the figure below is 23.5 V. The resistors have resistances R1 = 46.6 0, R2 = 94.3 Q, and R3 = 53.0 N. R1 R3 (a) What is the current in the emf device? A (b) If a fourth resistor is added in parallel with the first three resistors, will the current in the emf device increase, decrease, or stay the same? O increase O decrease O stay the same (c) If, instead, a fourth resistor is added in series with the emf device, will the current in the emf device increase, decrease, or stay the same? O increase O decrease O stay the same

Consider the circuit shown in the figure. Suppose the four resistors in this circuit have the values R1 = 12 Ω, R2 = 7.1 Ω , R3 = 7.1 Ω, and R4 = 13 Ω, and that the emf of the battery is ε = 18 V. Find the current through each resistor and the power dissipated in the circuit.

A simple RC circuit has a switch, a resistor (R), and a capacitor (C) all wired together in series. Assuming the switch is open initially and capacitor is fully charged to a potential V and holds a charge Qo, which of the following expressions describes the current through the circuit at time t=RC after the switch is closed? I = Ve R Selected Answer: V² Answers: I RC I = V R.e I = RC·e V %3D

A student in the laboratory connects a 17 Ω resistor, a 26 Ω resistor, and a 34 Ω resistor in parallel and then connects the arrangement to a 46 V dc source. (a) What is the current? A(b) What is the power? W