Electronics Engineering

1000 microamps = 1 milliamp

When waves equal in wavelength and amplitude, but traveling in opposite directions, continuously interfere with each other.

George W. Boolean. AK

Since the zener conducts and regulates voltage in reverse bias, the 5V would bias the zener on with a 4.7V drop. If the 5V source had a low enough impedance, the zener or the source would self destruct.

Power factor is defined as the ratio of real power over total power. Total power is the vector sum of real and reactive power.

Yes to both.

If you mean zero electrical resistance for an electromagnet, this is possible with superconductivity. This can be achieved for certain materials at fairly low temperatures - typically a few kelvin.

74LS02 is a low power schottky, which is a type of i.c. chip.

IN time domain analysis time is the independent variable.

when a system is given an excitation input is a respose output.this response varies with the time is called time response.

komal

Port 0 has open drain output drivers, so if you want to use it for output (or its external memory address/data bus use) the pull-ups must be provided externally.

Ports 1, 2, and 3 have built in internal pull-ups.

Check your datasheet for details.

infinite positive impulse wave on each leading edge, infinite negative impulse wave on each trailing edge. the rest of the time it is 0V. this assumes an ideal square wave, which I must assume as you did not give rise/fall times or edge slew rates.

In the context of the integrated circuit IC CA3140, "CA" typically stands for "complementary" and "analog." The CA3140 is a type of operational amplifier (op-amp) that utilizes complementary input stages, which enhances its performance in terms of speed and input impedance. This designation helps differentiate it from other variants or types of op-amps that may have different characteristics.

We can guess that the resistor is used for discharging the capacitor's plates. Generally we short the two terminals on a capacitor to discharge it fully. A resistor will take more time to do this than shorting-out the terminals: the higher the resistance, the longer the time that will be taken to discharge a capacitor fully.

No, the diode is physically rated to only 75 Amps, at voltages up to 1000V. Its not a power factor thing, the top limit is 75 Amps.

Frequency has nothing to do with distance, the only reason frequency is sometimes associated with distance, is the length of one full RF cycle in the air, this is calculated with the following formula: wave length in meters = 300/frequency in MHz, that is say the frequency is 30 MHz (a frequency allocated to radio armatures) 300/30 = 10 meters that is then called the 10 meter band. This will then be the length of a balanced long wire antenna for that frequency or a 1/2 wave dipole will be 5 meters long. In the old days before FM, the radio bands was announced in meter bands where say 750 kHz was the 300/.750 = 400 meters. So if frequency = 0 then there is no signal and you can't divide by zero if one try to divide by zero on any calculator you will get an error message "cannot divide by zero".

• SDH and PDH are two digital hierarchies in which different line speeds (e.g. E1, T1, STM1) are categorized.
• PDH (plesiosynchronous digital hierarchy) was replaced by SDH (synchronous digital hierarchy) due to its drawback in synchronisation where plesio refers to nearlysynchronous.
• E1, T1 and J1 are generally categorized under PDH. STM1, OC3, STM4, OC12 etc. are categorized under SDH.
• E1 is used worldwide nowadays in 2G technologies except North America and Japan (who are using T1 and J1 respectively). It is the line speed of 2Mbps. But how this speed comes along? The derivation is as follows.
• The audio signals were sampled and converted to digital signal at 64kbps, since 1960s for digital transmission of voice calls. When 32 channels (30 assigned for voice channels and 2 channels for framing and signaling), with each having speed of 64kbps are put together (or we call multiplexing), a line speed of E1, i.e. 2Mbps is produced by having 32 x 64kbps = 2.048Mbps.
• T1 line, which transmits at 1.544 Mbps can be interconnected with E1 for international use.
• Having 3 different speeds (E1, T1 and J1), PDH was later replaced by SDH in order to standardize the speed, making only 1 standard speed worldwide, which is STM1 having the speed of 155.52Mbps.

ICS 214

soft, light, hesrd.

The type of filament used in tube light is that one which is thin and surrounded by an oblong metal shield.

yes

Voltage = Current x Resistance

giving us

Current = Voltage / Resistance

i.e. Voltage divided by resistance

Cathode rays themselves are invisible; however, when they strike a phosphorescent material or a fluorescent screen, they can produce light, often appearing as a green or blue glow. The specific color observed depends on the type of material used for fluorescence. In vacuum tubes, for instance, the glow can vary based on the coating of the screen.

The time it takes for a fuse to blow, either "fast blow" or "slow blow" is determined by the design of the fuse and is described in a table or graph provided by the manufacturer. In general, the higher the applied overload current, the faster the fuse will blow. Fast blow fuses can open in milliseconds, slow blow fuses can open in several seconds. The fuse used depends entirely on the application and what kind of circuit it is protecting.