If we say that something acts as a "short circuit," it means that the path has...
If we say that something acts as a "short circuit," it means
that the path has very low resistance to current flow.
Which of the following represents a situation that could be
described as a "short circuit?"
a capacitor in a circuit with a very low frequency AC generator
a resistor in a circuit with a very low frequency AC generator
a capacitor in a circuit with a high frequency AC generator
a resistor in a circuit with a high frequency AC generator
Homework Answers
a capacitor in a circuit with a high frequency AC generator because
At high frequencies, the capacitor only has time to get a very little charge on it which means it has very little "back voltage" or "counter voltage".
Add Answer to:
If we say that something acts as a "short circuit," it means
that the path has...
The voltage across and the current through a single circuit element connected to an ac generator...
The voltage across and the current through a single circuit element
connected to an ac generator are shown in the graph.
Which one of the following statements concerning this circuit
element is true?
-the element could be a resistor or a capacitor.
-the element is a resistor.
-the element is a capacitor.
-the element could be a resistor or an inductor.
-the element is an inductor.
At what frequency do charges oscillate
in this circuit?
PHYS 212 RECITATION EXERCISE 1: USING PHASORS FOR A DRIVEN RC CIRCUIT We will consider a...
PHYS 212 RECITATION EXERCISE 1: USING PHASORS FOR A DRIVEN RC CIRCUIT We will consider a circuit consisting of a time varying emf in series with a capacitor and resistor. The capacitance and resistance are fixed but we can tune the frequency of the source. In an AC circuit, each element has a "reactance" which can be used to relate the peak current through the element to the peak voltage across the element 1. What does the angular frequency of...
A circuit has an ac voltage source and a resistor and capacitor connected in series. There is no inductor.
A circuit has an ac voltage source and a resistor and capacitor connected in series. There is no inductor. The ac voltage source has voltage amplitude 0.900 kV and angular frequency w = 20.0 rad/s. The voltage amplitude across the capacitor is 0.500 kV. The resistor has resistance R= 0.300 kΩ. Part A What is the voltage amplitude across the resistor? Part B What is the capacitance C of the capacitor? Part C Does the source voltage lag or lead the current? Part D What is the average...
The circuit shown below contains an AC generator which provides a source of sinusoidally varying emf...
The circuit shown below contains an AC generator which provides a source of sinusoidally varying emf epsilon (t) = epsilon _0 sin omega t, a resistor with resistance R, and a "black box," which contains either an inductor or a capacitor, but not both. The amplitude of the driving emf, epsilon _0, is 100 Squareroot 2 V, and the angular frequency omega is 10 rad/s. We measure the current in the circuit and find that it is given as a...
1) Which circuit has the largest maximum current? 2) In which circuit is the most power...
1) Which circuit has the largest maximum current?
2) In which circuit is the most power supplied by the AC
generator?
- A conceptual and numerical explaination would be
appreciated!
Circuit A) A 10 Ohm resistor B) 0.1 microFarad capacitor C) 1mH
inductor
2. (Short Circuits) An Ammeter is a device that can measure current through a circuit compo-...
2. (Short Circuits) An Ammeter is a device that can measure current through a circuit compo- nent. It is devised to be a device that has a VERY LOW internal resistance r. You use the device by connecting the device in series with the branch of the circuit you want to measure the current through. Suppose you accidentally connected the ammeter in parallel with a bat- tery and another resistor (with resistance R»r). Using Kirchoff's rules, show that when s...
(a) A capacitor has a value of 5 μF. Explain in terms of electric charge what this means. (b) The 5 uF capacitor shown in the circuit below is initially uncharged. The circuit is connected to a compu...
(a) A capacitor has a value of 5 μF. Explain in terms of electric charge what this means. (b) The 5 uF capacitor shown in the circuit below is initially uncharged. The circuit is connected to a computer and switch S is closed. The monitor of the computer displays a graph of current against time as the capacitor charges monitoT charging current/uA 30 20 10 0 . 2,3 4 time s computer The battery has negligible internal resistance. (i) Calculate...
4. The current in an RL circuit increases to 95% of its final value 3 seconds...
4. The current in an RL circuit increases to 95% of its final value 3 seconds after the switch is closed. The inductance in the circuit is 0.310 H. Find the inductive time constant and resistance for the circuit. (Assume the inductor has neglible resistance). Show your work. 5. At resonance, the reactance of the inductor (L) and the capacitor (C) cancel each other so that the impedance (Z) is just the resistance (R). Using the values from this experiment...
A Series L-R-C Circuit: The Phasor Approach
Part AFind the impedance (defined by ) of the circuitusing thephasor diagram shown. Notice that in this series circuit,the current is same for all elements of the circuit:.You may find the following reminders helpful:In a series circuit, the overall voltage is the sum of theindividual voltages.In an AC circuit, the voltage across a capacitor lags behindthe current, whereas the voltage across an inductor leads thecurrent.The reactance (effective resistance) of an inductor in an ACcircuit is given by .The reactance (effective...
The voltage across and the current through a single circuit element
connected to an ac generator are shown in the graph.
Which one of the following statements concerning this circuit
element is true?
-the element could be a resistor or a capacitor.
-the element is a resistor.
-the element is a capacitor.
-the element could be a resistor or an inductor.
-the element is an inductor.
At what frequency do charges oscillate
in this circuit?
PHYS 212 RECITATION EXERCISE 1: USING PHASORS FOR A DRIVEN RC CIRCUIT We will consider a circuit consisting of a time varying emf in series with a capacitor and resistor. The capacitance and resistance are fixed but we can tune the frequency of the source. In an AC circuit, each element has a "reactance" which can be used to relate the peak current through the element to the peak voltage across the element 1. What does the angular frequency of...
The circuit shown below contains an AC generator which provides a source of sinusoidally varying emf epsilon (t) = epsilon _0 sin omega t, a resistor with resistance R, and a "black box," which contains either an inductor or a capacitor, but not both. The amplitude of the driving emf, epsilon _0, is 100 Squareroot 2 V, and the angular frequency omega is 10 rad/s. We measure the current in the circuit and find that it is given as a...
1) Which circuit has the largest maximum current?
2) In which circuit is the most power supplied by the AC
generator?
- A conceptual and numerical explaination would be
appreciated!
Circuit A) A 10 Ohm resistor B) 0.1 microFarad capacitor C) 1mH
inductor
2. (Short Circuits) An Ammeter is a device that can measure current through a circuit compo- nent. It is devised to be a device that has a VERY LOW internal resistance r. You use the device by connecting the device in series with the branch of the circuit you want to measure the current through. Suppose you accidentally connected the ammeter in parallel with a bat- tery and another resistor (with resistance R»r). Using Kirchoff's rules, show that when s...
(a) A capacitor has a value of 5 μF. Explain in terms of electric charge what this means. (b) The 5 uF capacitor shown in the circuit below is initially uncharged. The circuit is connected to a computer and switch S is closed. The monitor of the computer displays a graph of current against time as the capacitor charges monitoT charging current/uA 30 20 10 0 . 2,3 4 time s computer The battery has negligible internal resistance. (i) Calculate...
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