Your friend says that according to Ohm’s law, high voltage produces high current. Then your friend asks, “So how can power be transmitted at high voltage and low current in a power line?” What is your illuminating response?

Q: What name is given to the rate at which energy is transferred?

A: Power is the rate of energy transfer from one system to another.

Q: Why does the filament of a lightbulb glow while the connecting wires do not?

A: The filament of a bulb is made of a metal with quite high resistance high melting point like…

Q: What is Voltage all about?

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Q: why the electric wire that is connecting in the post outside a little bit saggy and not tightly tied…

A: Question : Why the electric wire that is connecting in the post outside a little bit saggy and not…

Q: Why is fuse wire fitted in porcelain casing?

A: During short circuit, the current in the circuit increases more than the maximum limit. As a result,…

Q: What determines the strength of the magnetic field that is produced around a single conductor?

A: Objective: To conclude what determines the strength of the magnetic field that is produced around a…

Q: What energy conversion does take place during the working of a dc current?

A: The conversion of electric energy into mechanical energy is done by DC motors whereas AC generators…

Q: Which of the lightbulbs, the 25-W bulb or the 60-W bulb , has the higher resistance? Which draws…

A: The power used in lightbulbs is calculated by using the formula P=VI=V2R=Et  , where V is the…

Q: What does a negative voltage source mean

A: Charge is defined by the charge of electrons so negative voltage represents excess of electrons…

Q: Differentiate amongst Current, Induced Current and Induced Voltage along with procedure to inducing…

A: Introduction :  Rate of flow of electrons is called current. Current generated due to variation in…

Q: Choose the BEST answer to the following: A step-up transformer in an electrical circuit can step up…

A: A step-up transformer is a static device, which is used in electric circuits to increase the voltage…

Q: It is an electronic device that transforms an alternating current into direct current.

A: A Rectifier is a device that converts alternating current into direct current. The Rectifier is made…

Q: what will happen to the current directions if the polarity of the nine-volt battery is reversed?

A:

Q: Between current and voltage, which remains the same for a 10-Ω and a 20-Ω resistor in parallel in a…

A:

Q: Why does the gravitational force between Earth and Moon predominate over electrical forces?

A:

Q: Why is electricity dangerous to humans?

A: Electricity flows from one point to another that will conduct it. One of the conductive substance of…

Q: What are the Properties of Alternating Current?

A: The properties of alternating current are: Frequency is denoted by f and is defined as the number…

Q: What is a galvanometer called when it has been calibrated to read current? When it has been…

A:

Q: What is the difference between direct current and alternating current?

A: The direct current is obtained by  a battery or cell. The alternating current is obtained by the…

Q: Which layer refers to the electrical signals sent down a wire?

A: physical layer refers to the electrical signals sent down a wire

Q: Why are copper and aluminium wires usually employed for electricity transmission?

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Q: In the phenomenon of superconductivity, what happens to electrical resistance at low temperatures?

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Q: What is the purpose of a switch?

A: Switch is an electrical component by which we can physically connect or disconnect the conducting…

Q: What are logic gates?

A: Logic gates are fundamental building blocks of digital systems. They perform basic logic functions.…

Q: What is the advantage of transmitting power at high voltages?

A:

Q: What is the total power used by a 4.5-A electric iron, a 0.9-A fan, and a 2.4-A refrigerator motor…

A: Given value--- i1 = 4.5 Amp. i2 = 0.9 Amp. i3 = 2.4 Amp. V = 120 V. We have to find--- total…

Q: What is basic similarity between a generator and an electric motor?

A: A generator converts mechanical energy into electrical energy, and electric motor converts…

Q: What is the difference between an open loop circuit and a closed loop circuit?

A: In an open loop circuit there is no existence of current while in a closed loop circuit there is…

Q: A woman with long hair touches a van de Graaff generator. Does this correspond to a high voltage or…

A: A Van de Graaff generator produces very high voltage direct current (DC) at low current level.Charge…

Q: Name the device used to protect the electric circuits from overloading and short circuits. On what…

A: In order to protect an electric circuit from excessive electric current, fuse is an electrical…

Q: Why is the tungsten used almost exclusively for filament of electric lamps?

A: In most of the electric bulbs and lamps tungsten is used as filament. The main reason is high…

Q: Why is tungsten used in electric bulbs and not any other metal is used?

A: One good reason for tungsten to be used in the incandescent light bulb is that it has a very high…

Q: Your tutor tells you that an ampere and a volt really measure the same thing and that the different…

A: This is because current is the rate of flow of charge per second. Voltage, that is potential…

Q: Which unit, Ampere (A)or Coulomb(C), is more fundamental and why?

A:

Q: what actually causes the current?

A: Electric current is the flow of electric charge through a particular area per unit time. In an…