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    Ohm's Law

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    Resistance and Ohms Law

    A television set connected to a 120 V outlet consumes 100 W of power and a current flow of 0.833 A through it. How long does it take for 10 trillion electrons to pass through the TV?

    Resistance and Ohms Law: equivalent resistance

    See attached file for full problem description with symbols and diagram. Find the equivalent resistance between points A and B for the group of resistors shown in Figure where R1 = 85 and R2 = 45 .

    Equivalent Resistance Seen by a Given Source

    For the circuit shown in Figure 2.42 (attached file), find: a) The equivalent resistance seen by the source. b) The current through and the power absorbed by the 90-Ω resistance. Given Vs= 110 V, R1= 90 Ω, R2= 50 Ω, R3= 40 Ω, R4= 20 Ω, R5= 30 Ω, R6= 10 Ω, R7= 60 Ω, R8= 80 Ω.

    Voltage Divider Circuit

    The voltage divider network of Figure 2.37 (attached file) is expected to provide 5 V at the output. The resistors, however, may not be exactly the same; that is, their tolerances are such that the resistances may not be exactly 5 kΩ. a) If the resistors have ± 10 percent tolerance, find the worst-case output voltages.

    Current Electricity: Kirchhoff and Ohms law, DC circuit

    Use Kirchhoff's current law and Ohm's law to determine the current in each of the resistors R4, R5, and R6 in the circuit of Figure 2.31 (see attached file). Vs= 10 V, R1= 20 ohms, R2= 40 ohms, R3= 10 ohms, R4=R5=R6= 15 ohms.

    Find Resistance with an Ohmmeter

    In the ohmmeter circuit shown, the voltage drop across the ammeter and the internal resistance of the 1.5V battery are negligible. The variable resistor R is adjusted to give full-scale deflection of the micoammeter when R_x is zero. Find the numerical value of R. (See attachment for diagram)

    Application of Faraday's law of electromagnetic induction

    (See attached file for full problem description with proper symbols and diagrams) --- 1. How fast would you have to move a 1.0 m long conductor to produce a motional emf of 1.0 V in a 4 x 10^ -4 T magnetic field (assume that the conductor moves perpendicular to the field)? If a resistance of 0.5 ohm is co

    Current in Resistor - which terminal will be positive?

    Refer to attached picture). There is a current of 10.0 amperes initially in the long straight wire shown at the bottom of the following diagram produces a flux of 0.0511 webers in the single loop circuit containing the resistor. If the current in the long straight wire is uniformly reduced to ¼ of its original value in 1.99

    Calculating maximum voltage, current and energy

    Please help with the following problem. Step by step calculations are given. An L-C circuit consists of a 60.0 mH inductor and 250 µF capacitor. The initial Charge in the capacitor is 6.00 µC and initial current in the inductor is zero. a) What is the maximum voltage across the capacitor? b) What is the maximum current

    Working with inductors - but connected to a battery

    1. An inductor is connected to the terminals of a battery that has an emf of 12.0V and negligible internal resistance. The current is 4.86mA at 0.725 ms after the connections is completed. After a long time the current is 6.45 mA. What is a) The resistance R of the inductor? b) The inductance L of the inductor?

    Gain and Output Voltage

    For the following operational amplifier circuits, find the gain and output voltage theoretically: a) Non-Inverting Amplifier Circuit (see attached file Non-Inverting Amplifier.jpg) b) Voltage Follower Amplifier Circuit (see attached file Voltage Follower Amplifier.jpg) c) Inverting Amplifier Circuit (see attached file Inver

    Current flowing through the circuit

    A capacitor has capacitance 4 microC/Volt. It is placed in series with a resistance of 48 Ohms and 25 volt source. When the current in the circuit has built a charge of 67 microC on the capacitor, how much current will be flowing through the circuit?

    Electric Resistance and Ohm's Law

    A bird lands on a bare copper wire carrying a current of 32 A. The wire is 8 gauge, which means that its cross-sectional area is 0.13 cm^2. (a) Find the difference in potential between the bird's feet, assuming they are separated by a distance of 6.0 cm. (b) Will your answer to part (a) increase or decrease if the separation

    Electric Circuits

    1) For the circuit below find: a) The current through R1. b) The current through R2. c) The current at the ammeter. See attached file for full problem description.

    Transfer Function

    Find the transfer function IL/Vs for the following circuit in the attached file.

    Circuit Analysis

    Refer to the following circuit. Assume ideal voltage source - find VBG and I2

    Resistor

    Ten volts are applied across points a and b depicted in the figure. (Ignore the resistance in the wire.) What is the current in the 12 ohm resistor?

    Efficiency of electrolysis (in joules).

    The amount of product produced by electrolysis is limited by Faraday's law. Therefore, as I understand it, the amount of product produced depends on the amps rather than on the volts (although the minimum voltage for a given reaction plus overvoltage must be met). For example, lets say you have a reaction that requires at

    Voltage Drop Across the Resistor

    Determine the voltage drop (from top to bottom) across the 16 ohm resistor in the circuit shown. Determine the voltage drop across the 4 ohm resistor. What is the voltage V?

    Rate of Change of Current

    In a simple electric circuit, Ohm's law states that V=IR, where V is the voltage in volts, I is the current in amperes and R is the resistance in ohms. Assume that, as the battery wears out, the voltage decreases at 0.01 volts per second and, as the resistor heats up, the resistance is increasing at 0.03 ohms per second. When th

    Lightbulb resistance and efficiency

    A GE Softwhite lightbulb is rated as follows: rated power = 60 W ; rated optical power = 820 lumens (lm) 1 lm = 1/680 W operating life = 1.5 h rated operating voltage = 115 V The resistance of the filament of the bulb, measured with a standard multimeter is 16.7 ohms. When the bulb is connected into a circuit and is

    Circuits and Circuit Elements

    1. Consider the circuit shown in the attachment. a. Do any of the bulbs have a complete circuit when all the switches are open? Which one(s)? b. Do any of the switches cause a short circuit when closed? Which one(s)? c. Which switches should be kept open, and which should be closed for the following to occur? * only bulbs A

    Fuse and circuits in series and parallel

    A fuse is a device to protect a circuit from the effects of a large current. The fuse is a small strip of metal that burns through when the current exceeds a certain value, thus producing an open circuit. Should a fuse be connected in series or in parallel with the circuit it is intended to protect? Explain.

    Ohms law and resistors configurations

    1. See attachment. 2. See attachment. 3. Three resistors are connected in series. Then they are connected in parallel. In which configuration will the resistance be greatest? a. series b. parallel c. It won't make any difference 4. See attachment. 5. See attachment.

    What is the resistance?

    1. An ammeter registers 2.5 A of current in a wire that is connected to a 9.0 V battery. What is the wire's resistance? 2. A small electronic device is rated at 0.25 W when connected to 120 V. What is the resistance of this device?

    Calculating Internal Resistance

    Question: A 1.40 ohm resistor is connected across a 9.00-V battery. The voltage between the terminals of the battery is observed to be only 8.00 V. Find the internal resistance of the battery. Make sure the answer is in Ohms.

    What is the magnitude of the current flowing through a device?

    The resistance of the first device is 12 ohms, the resistance of the second device is 4 ohms, and the voltage developed by the generator is 40 V. What is the magnitude of the current flowing through the first device? (a) 3.33 A (b) 8A (c)10A or (d) 13.32A