The power usage of a DC strip heater is to be determined at a 95% confidence interval, using a voltmeter and an ohmeter (P= E^2/R), where P is power inwatts, E is the electrical potential in volts, and R is the resistance in ohms. The voltmeter and ogmeter have the following specs Instrument Error (95%) Resolution Voltmeter +- 0.5% 0.001 Ohmmeter +- 0.3% 0.001 Determine the design stage uncertainty of power, using a nominal value of E = 8V and R = 5 ohm
The power usage of a DC strip heater is to be determined at a 95% confidence interval, using a voltmeter and an ohmeter (P= E^2/R), where P is power inwatts, E is the electrical potential in volts, and R is the resistance in ohms. The voltmeter and ogmeter have the following specs Instrument Error (95%) Resolution Voltmeter +- 0.5% 0.001 Ohmmeter +- 0.3% 0.001 Determine the design stage uncertainty of power, using a nominal value of E = 8V and R = 5 ohm
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The power usage of a DC strip heater is to be determined at a 95% confidence interval, using a voltmeter and an ohmeter (P= E^2/R), where P is power inwatts, E is the electrical potential in volts, and R is the resistance in ohms.
The voltmeter and ogmeter have the following specs
| Instrument Error (95%) | Resolution | |
| Voltmeter | +- 0.5% | 0.001 |
| Ohmmeter | +- 0.3% | 0.001 |
Determine the design stage uncertainty of power, using a nominal value of E = 8V and R = 5 ohm
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