1. The diameter of an atom is about (i) 10-10 m (ii) 10-8m (iii) 10-2 m (iv) 10-15 m 2. The number of compounds available in nature is (i) 105 (ii) 300 (iii) 1000 (iv) unlimited 3. The mass of a proton is …….. the mass of electron. (i) equal to (ii) less than (iii) […]
Most insulations fail during one of the following events: Switching overvoltage due to the inductive and capacitive energy of the system overshooting the system voltage that can be as high as 2 × rated voltage. This is analogous to overpressure due to water hammer when a water pipe is suddenly shut off (switched-off). Lightning overvoltage
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The fuse provides protection by melting away a thin metal link in the faulted circuit. The metal link may be of silver, copper, or nickel, silver being more common for long-term performance stability. The fuse body is generally filled with a sand-type filler (Figure 1) to suppress sparks when the fuse link melts and interrupts the
When a high reverse-biased voltage applied to a diode may create a high reverse current, which can generate excessive heat and cause a diode to break down. The applied reverse voltage at which the breakdown occurs is called the breakdown voltage, or peak reverse voltage. A special diode called a zener diode is connected to
Thevenin’s theorem is very useful in solving electrical networks which may not be easily solved by other methods. In this article, I will discuss this theorem and show some of the thevenin theorem examples to make this theorem easily understandable. Thévenin’s theorem is a circuit analysis technique that reduces any linear bilateral network to an equivalent
The Kirchhoff’s Laws are very useful in solving electrical networks which may not be easily solved by Ohm’s Law. In this article, I will describe the Kirchhoff’s current law and will show some kirchhoff’s current law examples to make this law easily understandable. Kirchhoff’s current law states the following: The summation of currents entering a node
Hi friends, In this article, I am going to discuss the MHD generator working principle. Also I will provide you some basic information about it. A Magneto Hydrodynamic Generator is a device which converts heat energy of a fuel directly into electrical energy without a conventional electric generator. This system eliminates all the
The current transformers are always used with the secondary windings circuit closed through ammeters, current coils of watt-meters or relay coils. Its secondary winding circuit should not be opened while its primary winding is energized. A violation of this precaution may lead to serious consequences. Here, I am discussing the reasons behind it. As we
Hi friends, in this article, I am going to discuss about lvdt working principle, lvdt advantages and disadvantages. My article will increase your knowledge, I hope so. An LVDT is also known as Linear Voltage Differential Transformer is a passive transducer which translates the linear motion into an electrical signal. It consists of
The procedure of connecting an alternator in parallel with another or with common bus bars is called synchronization of alternator. Conditions for Synchronization of Alternators For proper synchronization of alternator, the following conditions must be fulfilled: All these conditions must be full filled to ensure that there will be no circulating current between the windings