Negative test cases for testing mobile phones: 1. removing the SIM card and made a call 2.by invalid phone number 3.made a call at which there is no tower signal 4.Made a call after removing the battery or at no power in battery and also we can... Read More

The HART protocol is an old Frequency Shift Keying way of sending data, typically from highway sensors. This is a very old standard by today's standards there are so much better ways to send data. Of course, 4-20 ma loops are even older, dating... Read More

TDMA: Time division multiple access (TDMA) is a channel access method for shared medium (usually radio) networks. It allows several users to share the same frequency channel by dividing the signal into different time slots. The users transmit in... Read More

You can measure a resistor in a circuit but the circuit will most likely affect the value read (usually making it look lower in resistance). A simple example would be if there were two resistors in parallel in the circuit. If you measure one, you... Read More

Flow of electrons is just what it says - electrons flow down a wire that is what current, is. Good conductors like copper and silver and aluminum have free electrons in their outer shells, and they jump from atom to atom down a wire. It is somewhat... Read More

Exact meaning of Manual testing is,testing the software or any application by manually without use of automation tools. Read More

A memory chip stores bits and mounted in a card with electrical contacts so a computer or camera can send data to be stored. There is not much more to it than that. Read More

You can tell the state of charge on a 9V battery by touching both poles across your tongue. If it tingles, the battery still has life. If not, throw it away. Read More

If you are talking about power, a 3db gain cuts the signal in half and another 3db gain, for a total of 6 cuts the signal in half again for a total attenuation of 75%. Read More

Air cannon is probably the simplest, PVC pipe from Home Depot and shoots things very far, can make any size you want, need a tire pump or air compressor to power it. It is also called Potato Cannons for obvious reasons. I shot a potato over 1000 feet... Read More

If it is then this is easy, you take the arcsine of 65% that gives you what angle you are at in the sine cycle, take the ratio of that to 360, and multiply that by 8mS to get the time of a full cycle, and then take one over that to get frequency.... Read More

Batteries work through a chemical process, some kind of ion exchange where the battery contains two elements that want to combine ions and give up an electron to cause current flow. They do this energy release all by themselves with no energy added,... Read More

All computer logic today uses FETs as switches. A FET is a switch with gain, meaning that a small signal change on its input (the Gate) causes a bigger signal in the Drain. Bigger does not mean bigger voltage, it usually means more current at the... Read More

The pay load size is of 32kb Read More

There is a limit to how far you can get television signals. The power is spreading out the farther you are away from the source. At some distance, you reach a point where the noise in the atmosphere becomes greater than the signal, and you can no... Read More

CISC Architecture Read More

There are "super capacitors" that are used for power backup - they are efficient for short-term power take-over, but they are leaky and are not good for long term. Batteries tend to die slowly, more slowly than the leakage on a power backup... Read More

By microwaves, do you mean radio signals, like in a microwave oven? These have nothing to do with sound. There is no way to "record" microwaves really. Sure, you can build a microwave transmitter with lots of power, enough to cook everyone in a... Read More

Fourier says that only a sine wave has no harmonic content. The math works out that if you have any wave shape other than a sign wave, you can break it down into a group ofsine waves of different harmonic frequency, phase, and amplitude. All those... Read More

If you look at the classic Bohr model of the atom (from 1913), you have electrons orbiting around a nucleus of protons and neutrons. Normally there are as many electrons (negative charge) as protons (positive charge), so the net charge of the atom is... Read More

A photodiode is made to detect light quickly a solar cell is made to collect energy from light. They are both typically silicon diodes, but modified to meet their different requirements. A photodiode has to be fast, which means low capacitance, which... Read More

There might be many common test cases: Here are 2 I) 1. For SMS: It uses UDP protocol 2. for MP3: Audio streaming also uses UDP protocol II) 1. for SMS: For entering text for SMS, you need to open Text editor. 2. for MP3: For entering/editing... Read More

There are zillions of things in electronics called encoders. You can look up LCDs and NAND gates as well and this is really basics. Read More

no of memory locations that can be addressed is 2 to the power of no. of address lines i.e. 2 power 14 Read More

You say many alternators, but really, you need only one. The more I think about this, the more I think it is not so hard to do. If you have a 6KW alternator, it's possible that it has some kind of voltage regulation, maybe the rotor is not a... Read More

You can control the field with anything, but why would you do it with torque? Why do you say net torque=0? What is the significance of variable speed? I am trying to think of why you would do this. If the torque were low, you could increase the... Read More