Recent questions tagged voltage

A copper rod which is 1 centimeter in diameter carries a current of 5 amps. The current is distributed uniformly throughout the rod. The magnetic field half way between the axis of the rod and its outside edge is:A copper rod which is 1 centimeter in diameter carries a current of 5 amps. The current is distributed uniformly throughout the rod. The magnetic fiel ...
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An infinitely long wire carries a current of three amps. The magnetic field outside the wire:
An infinitely long wire carries a current of three amps. The magnetic field outside the wire:An infinitely long wire carries a current of three amps. The magnetic field outside the wire: w) points radially away from the wire x) points radial ...
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Three capacitors with different capacitances are connected in series. Which of the following statements is TRUE?
Three capacitors with different capacitances are connected in series. Which of the following statements is TRUE?Three capacitors with different capacitances are connected in series. Which of the following statements is TRUE? w) All three of the capacitors have ...
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Used normally, a 150-watt, 120 volt light bulb requires how many amps of current?
Used normally, a 150-watt, 120 volt light bulb requires how many amps of current?Used normally, a 150-watt, 120 volt light bulb requires how many amps of current? ...
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An alternating current can induce voltage because it has
An alternating current can induce voltage because it hasAn alternating current can induce voltage because it has A) ripple value B) varying magnetic field C) weaker magnetic field than direct current D) hi ...
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In the circuit below, the battery has an internal resistance $r$ and an emf $\varepsilon$. A variable resistor $R$ is connected in the circuit and the ammeter and voltmeter register readings. In the circuit below, the battery has an internal resistance $r$ and an emf $\varepsilon$. A variable resistor $R$ is connected in the circuit and t ...
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Suppose we know the voltage is 12 V, and the resistance is 3 Ω. What is the current?
Suppose we know the voltage is 12 V, and the resistance is 3 Ω. What is the current?Suppose we know the voltage is 12 V, and the resistance is 3 &amp;Omega;. What is the current? ...
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Do the voltage drops given in the figure conform to Kirchoff’s Voltage Law?
Do the voltage drops given in the figure conform to Kirchoff’s Voltage Law? If you have any circuit with many loops, the algebraic sum of the voltages around any loop in the circuit is zero; this is known as Kirchoff’s Volta ...
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When the two resistors are connected in PARALLEL to the same battery, the current through the battery will be …
When the two resistors are connected in PARALLEL to the same battery, the current through the battery will be … Two resistors of equal resistance are connected in SERIES to a battery with negligible internal resistance. The current through the battery is I. ...
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How many turns of wire must a coil have in order to induce a voltage of 10.5 volts when exposed to a changing magnetic flux with a rate of 0.0075 Wb/s?
How many turns of wire must a coil have in order to induce a voltage of 10.5 volts when exposed to a changing magnetic flux with a rate of 0.0075 Wb/s?How many turns of wire must a coil have in order to induce a voltage of 10.5 volts when exposed to a changing magnetic flux with a rate of 0.0075 Wb/s ...
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The magnetic flux through a coil containing 50 loops changes from 30 Wb to –30 Wb in 0.42 seconds. What is the voltage induced in the coil?
The magnetic flux through a coil containing 50 loops changes from 30 Wb to –30 Wb in 0.42 seconds. What is the voltage induced in the coil?The magnetic flux through a coil containing 50 loops changes from 30 Wb to –30 Wb in 0.42 seconds. What is the voltage induced in the coil? ...
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Do electrons in a circuit move in the direction of current?
Do electrons in a circuit move in the direction of current?Do electrons in a circuit move in the direction of current? ...
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I can't understand the polarization please explain it to me ?
I can't understand the polarization please explain it to me ?I can't understand the polarization please explain it to me ? ...
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Why do batteries die?
Why do batteries die?Why do batteries die? ...
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What happens if we hook up a resistor and a capacitor with the same battery in parallel and in series?
What happens if we hook up a resistor and a capacitor with the same battery in parallel and in series?What happens if we hook up a resistor and a capacitor with the same battery in parallel and in series? ...
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Why are the capacitors with the bigger capacitance have the lower Voltage?
Why are the capacitors with the bigger capacitance have the lower Voltage?Why are the capacitors with the bigger capacitance have the lower Voltage? ...
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Is it true that the higher the capacitance, the lower the voltage of a capacitor hooked up in a series?
Is it true that the higher the capacitance, the lower the voltage of a capacitor hooked up in a series?Is it true that the higher the capacitance, the lower the voltage of a capacitor hooked up in a series? ...
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How does the loop rule apply when the battery is just connected to the circuit and the capacitors haven't had enough time to build up charge yet?
How does the loop rule apply when the battery is just connected to the circuit and the capacitors haven't had enough time to build up charge yet?If the voltage increases as charge increases, which increases as time goes on. How does the loop rule apply when the battery is just connected to the ...
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Why is the sum of the voltages of the capacitors equal to the voltage of the battery?
Why is the sum of the voltages of the capacitors equal to the voltage of the battery?Why is the sum of the voltages of the capacitors equal to the voltage of the battery? ...
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Whats the difference between a capacitor and a battery?
Whats the difference between a capacitor and a battery?Whats the difference between a capacitor and a battery? ...
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Why exactly is electric potential lower at where the negative charges are than at where the positive charges are?
Why exactly is electric potential lower at where the negative charges are than at where the positive charges are?Why exactly is electric potential lower at where the negative charges are than at where the positive charges are? ...
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Why is electric potential high near positive charges ?
Why is electric potential high near positive charges ?Why is electric potential high near positive charges ? ...
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Do capacitors have limit to the voltage of battery they can be connected with or they can handle any?
Do capacitors have limit to the voltage of battery they can be connected with or they can handle any?Do capacitors have limit to the voltage of battery they can be connected with or they can handle any? ...
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Does the potential difference on the capacitor immediately jump to the battery’s potential difference ? Explain the reason for the observed behavior.
Does the potential difference on the capacitor immediately jump to the battery’s potential difference ? Explain the reason for the observed behavior.Does the potential difference on the capacitor immediately jump to the battery’s potential difference ? Explain the reason for the observed behavior. ...
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when charging a capacitor how electrons move from +ve terminal to -ve terminal & wthout interruption to the flow. please explain it with an example