Showing posts with label Electricity. Show all posts
Showing posts with label Electricity. Show all posts
Transformer and Hysteresis
Transformer Hysteresis Losses are caused because of the friction of the molecules against the flow of the magnetic lines of force required to magnetise th…
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Kaniz e zehra asked Two unlike capacitor is charged to a certain potential difference it is then immersed in oil what happen to it s capacitance ,charge and potential?
11/13/2014 9:49:27 Kaniz e zehra asked Two unlike capacitor is charged to a certain potential difference it is then immersed in oil what happen to it s capac…
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How lightning rod works?
The lightning rod, which Benjamin Franklin invented in 1749, is a metal pole mounted atop a building that draws lightning's electrical charge away from t…
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What happens to capacitance of parallel plate capacitor when the size of plates increase and distance between them decrease?
There are three basic factors of capacitor construction determining the amount of capacitance created. These factors all dictate capacitance by affecting ho…
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What is the difference between AC and DC Generator?
A generator produces electricity in a form that looks like a linear sine wave: first it is positive and then negative. To create AC electricity, the central…
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Difference between AC and DC
Electricity flows in two ways; either in alternating current (AC) or in direct current (DC). Electricity or 'current' is nothing more than moving elec…
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What is the difference between emf and voltage?
Potential difference is simply a voltage difference between two points in a closed electrical circuit with a voltage source circuit (or in free space). So, th…
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Commutator is the only difference b/w AC &DC motors or some thing else?
Ans. Following the the three main differences between AC and DC motor. 1. The most basic difference is the power source. A.C. motors are powered from alter…
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What is Tesla Coil ?
The Tesla coil is one of Nikola Tesla's most famous inventions. It is essentially a high-frequency air-core transformer. It takes the output from a 120vAC…
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How the capacitor is work in electrostatic induction?
Definition: A capacitor is most simply defined as two conductors separated by a dielectric. It is easier to grasp the significance of this definition by loo…
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Thermistors- Working and Advantages (College Level)
Thermistors are variable resistance type of transducers. Let us see what they are and their working. What are Thermistors? Thermistors are one of the mos…
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In ohmic law the voltage is directly proportional to current while in case of electric transformer the situation is quite reverse voltage is inversely proportion to current.clarification is required.
Actually, according to Ohm,s Law I= V/R, clearly Current is directly proportional to the Voltage, But according to P=VI or I=P/V, it shows that current is inv…
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What is difference b/w conductors and insulators?
The behavior of an object that has been charged is dependent upon whether the object is made of a conductive or a nonconductive material. Conductors ar…
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What is the difference between alternating current and direct current.(College Level)
A battery cell gives "d.c." or "direct current" which means that a steady voltage is available to drive your radio or whatever. Less well …
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Do bends in a wire effect its resistance?
Ans.It shouldn't, unless the bend is specifically a coil, where the physics is different. There are 4 factors that can affect R: 1. Length of the condu…
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Why is the internal resistance of a cell not constant?
Ans. This can also answer to the question that "Why internal resistance of battery increases with usage "? The internal resistance depends on the…
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Electric Power Transmission (College Level )
The electrical power generated in a power station situated in a remote place is transmitted to different regions for domestic and industrial uses. Here we di…
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What are the uses of capacitor?
Ans: One of the most ubiquitous passive components used is the capacitor, found in nearly every electronic device ever made. Capacitors have a number of esse…
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Q. A charged rod attracts bits of cork dust which agter touching the rod , often jump violently away from it. why?
Q. A charged rod attracts bits of cork dust which agter touching the rod , often jump violently away from it. why? Answer: Some electrons of charged rod at…
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XII Physics : Sample Practical Activities Part 1
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For Aga Khan Board Download Contains: Topic 11: Electrostatics 1. 11.7.3 Determine the relation between current and capacitance when …
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