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Why is the theoretical value differ from the experimental value that you obtained from the voltage?
Wiki User
∙ 13y ago
Your question is lacking in enough detail to give you a precise answer. However, it is not unusual in any experiment to get different experimental values depending on the controls you place on the experiment. For example, using Ohm's Law the Voltage is Current x Resistance.
Say you have a simple DC circuit with a 100 ohm resistor across a 10 Volt supply. Theory tell us that the current is equal to one-tenth amp (.1A). However, when you measure the current with an ampmeter the value is .15 A. Among other things the following things could go wrong. (Sample errors chosen at random to illustrate the point)
1.) The voltage really isn't 10 volts, it is only 9.8 volts under load.
2.) Your ampmeter isn't calibrated correctly and reading is off.
3. ) You have an analog ampmeter and there is a paralax error in reading the meter which throws off your measurement.
4.) The tolerance of the resistor is 20% so you don't really have 100 ohms.
5.) Temperature could play a factor.
6.) There could be a loose connection.
7.) Your little brother dripped jelly on the resistor effectively changing the end to end resistance, and so forth.
Wiki User
∙ 13y ago
Hamisi Mkanga
how to get theoretical voltage from given resistors and given experimental voltages
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