Basic Electricity and Electronics for Control: Fundamentals and Applications, 3rd Edition

CHAPTER 6

1.

A 50-V full-scale reading is desired. What value of a multiplier resistor is required if the meter movement has

Im = 10 microamp, Rm = 500 ohms Answer: _____________ ohms

2.

A 10-V full-scale reading is desired. What value multiplier resistor is required if the meter movement has

Im = 1mA, Rm = 150 ohms Answer: _____________ ohms

3.

In the space below, draw a voltmeter for 25V fsd. The meter movement has an Im = 0.5mA and an Rm = 200 ohms. Use a common resistor value and a variable resistor for calibration, and label all component values.

4.

List the five main disadvantages of analog meters compared to digital meters.

5.

Given a meter with Im = 1mA and Rm = 50 ohms, determine the values of the multiplier resistors for the meter shown in the following figure.

R (1000V) = ______________

R (100V) = _______________

R (10V) = _______________

R (1.0V) = 820 ohms, R(cal) = 200 ohms

6.

If in Problem 5, each fixed resistor has a tolerance of + 0.1% and the movement has an accuracy of 1.0%, what is the accuracy when measuring 5V on the 5V scale?

7.

Given a meter with Im = 20 microamps and Rm = 325 ohms, determine the values of the multiplier resistors for the meter shown in the following figure.

R(5V) = _______

R(1V) = _______

R(0.5V) = _______

R(0.1V) = _______

8.

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