The manufacturer's guide states that the thermistor has a resistance of 12 kΩ at room temperature. The student wants to confirm the accuracy of this value before starting the investigation. At room temperature, the voltmeter shows a reading of 8 V. Determine if this reading is consistent with the manufacturer's value of resistance.
Question
The manufacturer's guide states that the thermistor has a resistance of 12 kΩ at room temperature. The student wants to confirm the accuracy of this value before starting the investigation. At room temperature, the voltmeter shows a reading of 8 V. Determine if this reading is consistent with the manufacturer's value of resistance.
Solution
To determine if the voltmeter reading is consistent with the manufacturer's value of resistance, we can use Ohm's Law, which states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points, and inversely proportional to the resistance (R) between them. The formula is I = V/R.
However, in this case, we don't have the current. We only have the voltage (V) and the resistance (R). We can rearrange the formula to solve for the voltage: V = I*R.
Given that we don't have the current, we can't directly verify the manufacturer's value of resistance. We would need to know the current flowing through the thermistor to be able to do this.
If the student has an ammeter, they could measure the current and then use Ohm's Law to calculate the resistance. If the calculated resistance is close to 12 kΩ, then the manufacturer's value is accurate. If not, then it's not accurate.
Similar Questions
A student is investigating the variation of resistance and temperature in a thermistor. The diagram shows part of the circuit the student intends to use. Complete the circuit diagram to show how the student should connect the apparatus, including a voltmeter and an ammeter.
At low temperatures, will a thermistor have a high or a low resistance?low resistancehigh resistance
A battery of negligible internal resistance is connected in series with a thermistor and a fixedresistor of resistance 12.0 kΩ, as shown.12.0 k VoutThe table shows the resistance of the thermistor at two different temperatures.temperature/ °Cresistance ofthermistor / kΩ20.0 12.050.0 5.00The potential difference Vout across the fixed resistor is 4.50 V when the thermistor is at atemperature of 20.0 °C.What is Vout when the thermistor is at a temperature of 50.0 °C?A 2.65 V B 3.18 V C 6.35 V D 10.8 V
Question 14 of 301077%At high temperatures is the current through a thermistor high or low?
A 0-200 V voltmeter has an accuracy of 0.75% of full scale reading. If voltage measured is 100 V, the error is3%2%1.5%75%4%
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.