- 1. Evaluate measurement error Av (%) due to the loading effect of a voltmeter with the internal resistance Ry = 10 M2, connected across resistor R= 2 M2. Resistor R, connected in series with resistor R, = 3 MQ and a voltage source Vs - 15 V. (Ans. Av = 10.7%] 2. A certain series circuit consists of two resistors R; = 500 k22, R3 = 100 kA2 and a voltage source Vs-12 V. Voltage across resistor R is measured with a voltmeter with sensitivity of 20,000 92/V and a scale (1 - 5) V. Find error of voltage measurement across resistor Rs. [Ans. 45.5%) 3. An ammeter with the scale 0 - 10 A has a guaranteed accuracy of 2% full-scale reading. The current measured in an experiment is 2.5 A. Define the error of the measurement in percents. [Ans. 8%) R 4. A certain voltage divider has an output voltage Vow described by the equation: Vour - Ver.) where Vs is a source voltage. If the resistors have tolerance of 10% cach, find the largest error for the output voltage. 5. Repeatable measurements of current in a circuit yield subset of values in mA): 30.3, 30.5. 31.2, 29.9, and 30.1. Determine the mean u and the standard deviation