The voltage, V, (in volts) across a circuit is given by Ohm's law: V = IR, where I is the current (in amps) flowing through the circuit and R is the resistance (in ohms). If we place two circuits, with resistance R1 and R2, in parallel, then their combined resistance, R, is given by 1/R = 1/R_1 + 1/R_2 Suppose the current is
A bird sits on a high voltage power line with its feet 2.0 cm apart. The wire is made of aluminum, is 2.0 cm in diameter and carries a current of 150 A. What is the potential difference between the bird's feet?
A battery with E=10V and internal resistance r= 1kohms is connected to a simple circuit with a total resistance of R=9kohms 1.)What is the current through the battery. 2.)What is the potential difference between the battery's terminals. 3.)How much power does the battery supply to the simple ciruit. 4.)How much power
A 250Ω resistor is connected in series with a 480µF capacitor. The voltage across the capacitor is VC = 7.6V sin [(120 rad s−1)t] i) Determine the capacitive reactance of the capacitor. ii) Derive an expression for the voltage VR across the resistor.
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A cylindrical tungsten filament 15 cm long with a diameter of 1.0 mm is carrying a current of 12.5A an it is to be used in an environment with changing ambient temperature (from 20 to 120C). What is the maximal electric field in the wire. What is the resistance? What will be the maximal potential drop?
Given I(0)=Q(0)=0, find the charge and current at a time t in a RLC circuit, if R=4ohms, L=2henries, C=0.5farads, and V(t)=2e^-t volts. Find the position and velocity of a mass m attached to a spring of constant k when subjected to an oscillating force F(t)=FsinBt. See the attached file.
A 1.70 m cylindrical rod of diameter 0.450 cm is connected to a power supply that maintains a constant potential difference of 15.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0 degree Celsius ) the ammeter reads 18.7A , while at 92.0 degree Celsius it reads 1
In the circuit of the figure, each resistor represents a light bulb. Let R1=R2=R3=R4=4.33 Ohms and let the EMF be 8.90 V. What is the current in each bulb?
A p.d. of 60 Vrms is connected between terminals A and B in the network below. See attachment for diagram. For a frequency of 50 Hz calculate: a. The J notation impedance of the network b. The phase angle c. The magnitude of the voltage across R1 and its phase angle relative to the supply voltage.
A power supply outputs 24VDC at 3A. I have a sensor that needs 24VDC at 100mA. If I do ohms law V/I = R I then do 24VDC/100mA and get 240 for resistance. My wire will go from the supply terminal block through a series wire then a resistor to my sensor. Will this method at 240 ohms reduce my current to 100mA from 3A. If not
See attached file for full problem description.
In the NEMA(NEC) code there is a procedure to size fuses, motor starters, and overloads knowing full load amps. How is this done using ohms law. Say full load amps is 2.6A which we have at work. We looked at the NEMA code and it said do 125% times 2.6A then 125% times that , but using ohms law what is going on? To know what f
I know V=IR, P=IV, P=I^2R and P lost = I^2R. Here problem....Told like in an AC distribution system like a power grid when voltage increased current is decreased where R is constant over the power lines. If current were increased voltage would decrease. These equations above plotted numbers to prove , which is what is really
A. What power is dissipated when a ½ amp current flows through a 5 ohm resistor? I=V/R=.25 .5-.25=.25 B. What current is flowing in the 8 ohm resistor? The 8 volt The circuit flows clockwise the first resistor is a 2 ohm the second is an 8 ohm circuit in a split circuit. E=I*R .5/8=.1562 C. What is the curr
The problem is in the right column of the attached page. There are two # 11's so it is the one on the right. See attached file for full problem description. You have a 200 ohms resistor, a 0.400 H inductor, and a 6.00 uF capacitor. Suppose you take the resistor and inductor and make a series circuit with a voltage source th
What is the potential difference across one wire of a 30-m extension cord made of 16-gauge copper wire carrying of 5 A?
A square film of Nichrome, an alloy of nickel and chromium, has copper electrodes deposited on two opposite edges. Show that the resistance between the electrodes depends only on the thickness of the film on its conductivity, as long as the film is square. This surface resistance is expressed in ohms per square.
In a certain neuron, the action of a synapse can be represented as in the figure below. The cell membrane resistance is 2Mohm and the reversal potential of the rest of the EPSP is 30mV above the resting potential of the cell. If a microelectrode records the EPSP as 5mV of depolarization (assume steady state), what was the effect
Please only do problems 2.40, 2.41, 2.45, 2.46, 2.47, 2.48, and 2.49. OK PLEASE show all equations used, work and PLEASE do not skip steps no matter how minor. I learn by example and need to see everything also including pictures of current flow, directions, picture of how each step progressed, etc..
Please only do review questions 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 2.10 and problems 2.2, 2.3, 2.4,2.5, and 2.6.
9. When a vertical beam of light passes through a transparent medium, the rate at which its intensity I decreases is proportional to I(t). where t represents the thickness of the medium (in feet). In clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity Jo of the incident beam. What is the intens
Please solve problems 26.60, 26.62, and 26.64. See attached file for full problem description.
(See attached file for full problem description) You have a 200 ohm resistor, a 0.400-H inductor, and a 6.00 -muF capacitor. Suppose you take the resistor and inductor and make a series circuit with a voltage source that has voltage amplitude 30.0 V and an angular frequency of 250 rad/s. a) What is the impedance of the ci
See attached file for full problem description.
Consider a series RLC circuit with R=15 ohm, L=200mH,C=75uf, and a maximum voltage of 150V. a) What is the impedance of the circuit at resonance? b) What is the resonance frequency of the circuit? c) When will the current be greatest - at resonance, at 10 percent below the resonant frequency, or at 10 percent above the reson
Can you help solve the following problem? An RC series circuit has a voltage source of 10Vac, a resistor of 10 Ohms, and a capacitor with an impedance of -j10 OHMS. What is the magnitude and phase angle of the current flow through the capacitor?
Please see attachment for diagrams. 1. Inverting Amplifier Configuration Assume an ideal op-amp. Two "rules" below: I. Current into op-amp is zero. II. The output attempts to do whatever possible to keep the input voltages the same. If R_3 = 1kOhm and R_1 = R_2 = 470 Ohm, what is the voltage gain? 2. Inverting
Please help provide the solutions to this 3 problems attached.