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How long would an 8 Amp hr battery last with 75mA current draw?
An 8 Amp hr battery would last approximately 106.67 hours with a 75mA current draw. This is calculated by dividing the battery capacity (in Amp hours) by the current draw (in mA) and converting the result to hours.
What is the total dissipative power for a 600 Ohm resistor with 75mA flowing?
Ohm's Law: Volts = Amps * Ohms That means that you have 45 volts across the resistor. Power = Volts * Amps That means that you 3.375 Watts going through the resistor.Alternative AnswerMultiply the square of the current by the resistance.
How to generate the forward-bias portion of the characteristics curve?
Build a dependent current source in the operating range of the diode in question. The 1N4148 (1N914), for instance, is a 75ma diode. I would build a current source capable of 0 to 50ma. Plot voltage versus current and then replot current versus voltage. Be prepared to plot on log-log or semi-log paper, in order to show the true nature of the curve. Also, be prepared to do several runs for several diodes, and also at several temperatures, because there are variations amongst diodes and also as a result of temperature. For most accurate reporting, you should measure the diode's temperature during the test runs, because the higher currents will cause it to warm up and change its curve shape. This would be a good example for a computer controlled test device. Sounds like a project to me????
Why AC is more dangerous than DC?
ANSWER:- Kouwenhoven's factors: AC changes direction frequently; it is the current usually supplied by household electrical outlets in the US and Europe. DC flows in the same direction constantly; it is the current supplied by batteries. Defibrillators and cardioverters usually deliver DC current. How AC affects the body depends largely on frequency. Low-frequency (50- to 60-Hz) AC is used in US (60 Hz) and European (50 Hz) households; it can be more dangerous than high-frequency AC and is 3 to 5 times more dangerous than DC of the same voltage and amperage. Low-frequency AC produces extended muscle contraction (tetany), which may freeze the hand to the current's source, prolonging exposure. DC is most likely to cause a single convulsive contraction, which often forces the victim away from the current's source. As per IEEE std. 80 as well..... let go current is 16mA for AC and 75mA for DC.... So there is nothing like AC will throw you off and DC will hold you off.... Question itself wrong....
