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IF capacitor that has been connected across a battery for comparatively long time becomes?
Wiki User
∙ 10y ago
If the capacitor isn't punctured or failed, then it becomes charged to the voltage
of the battery almost immediately after it's connected to it, and stays that way.
Wiki User
∙ 10y ago
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Why capacitor is connected to earth in circuit?
when a capacitor is connected to earth the potential of capacitor becomes zero. as a result all the charge residing on the conductors of a capacitor passes away and the final charge on capacitor becomes zero
A lamp is connected to a battery if a capacitor is inserted in the positive wire between the battery and the lamp what will happen?
large capacitors will become charged in a fraction of a second if a DC voltage is applied to its terminalsonce a capacitor becomes fully charge it acts as an open circuit to direct current in other words, once the capacitor charged by a DC voltage, the current will cease to flow in the branch of the circuit which contains the capacitor.a capacitor also offers opposition known as (capacitive reactance) to alternating current. it does not , however ,act as an open circuit to when an a-c alternating current voltage is applied.
What will happen if battery is shorted and grounded?
If a battery is "shorted", meaning that its terminals are connected together through a low resistance, high current flows in the connection and the battery becomes discharged very soon. It makes no difference whether any part of the battery is connected to ground.
What happens to the voltage across a capacitor as it discharges?
well to get the answer first know the principle by which a capacitor(consider a capacitor without dielectric) gets charged .let a capacitor with plates p1 and p2 and resistor in parlell are connected to a DC source , when the switch is closed the circuit is in ON state and current starts flowing ,assume the flow of current as the movement of negative charges then the concept would be much clear. assume that p1 is connected with positive terminal of the battery and p2 with the negative terminal ,now as the switch is closed the negative charge on p1 is attracted by the positive terminal of the battery and is driven to the other plate p2 of capacitor.as this process continues charge seperation increases and potential difference starts getting developed and after a very long time the potential diff. across capacitor becomes equal to the applied voltage V. during discharging first of all we short the battery , this mplies that we are short circuiting plates p1 and p2 so again charge redistribution takes place and after a longtime both the plates become electrically nuetral
When a circuit consists of a capacitor and a resistor in series with a voltage source and the voltage across the resistor becomes zero then the capacitor is?
fully charged.
How does the charge vary with time in the R-C circuit?
well to get the answer first know the principle by which a capacitor(consider a capacitor without dielectric) gets charged .let a capacitor with plates p1 and p2 and resistor in parlell are connected to a DC source , when the switch is closed the circuit is in ON state and current starts flowing ,assume the flow of current as the movement of negative charges then the concept would be much clear. assume that p1 is connected with positive terminal of the battery and p2 with the negative terminal ,now as the switch is closed the negative charge on p1 is attracted by the positive terminal of the battery and is driven to the other plate p2 of capacitor.as this process continues charge seperation increases and potential difference starts getting developed and after a very long time the potential diff. across capacitor becomes equal to the applied voltage V. the maximum charge is Q0=CV and charge at any time is , Q(t)=Q0(1-e^(-t/T)) where T=time constant of the circuit
How capacitor help to start the motor of ceiling fan?
Most ceiling fans use a type of motor known as a "permanent split capacitor motor". These motors have two coils, a "start" and a "run" winding. A capacitor is connected in series with the start winding to insert a phase shift, but once the motor is up to speed it becomes an auxiliary winding. In order to reverse the motor, the capacitor is applied to the "run" winding which then becomes the "start" winding. In some cases the windings may have taps to provide different speeds, in others the value of the start/run capacitor is lowered to provide lower speeds. Yet other designs will have additional capacitors wired in series with the motor as a whole to regulate speeds.
Why Power factor becomes less lagging when capacitor is switched on?
Because capacitor withdraw leading current from source and net resultant become less lagging.
Where is the Ground wire on alternator from battery?
There usually isn't one. The vehicle becomes the ground, and since the alternator is physically attached to the engine, the case of the alternator becomes the ground. Note that the battery is also connected to the vehicle chassis, usually at 2 or more points, and that the engine usually has a grounding strap to some solid point on the chassis.
What form of energy does electrical energy become in a battery operated car?
When it flows into the battery, it becomes chemical energy. When it flows out of the battery, it becomes kinetic energy.
What happens when you wrap foil around a battery?
The battery becomes hot
What happens to the output voltage of a rectifier if the capacitor becomes very leaky?
A leaky capacitor will act like a load therefore decreasing the DC and increasing ripple eventually the capacitor it will self destruct because of heating probaly taking out the rectifiers as well.
