Lesson 1
PRACTICE EXERCISE
1.
For reference and standardization, the potentiometer requires
a.
A standard cell or zener diode voltage source
b.
Ratios obtained from fixed and variable precision resistors
c.
Neither a or b
d.
Both a and b
2.
The chief advantage of the potentiometer in the measurement of current
and resistance is its
a.
Direct
applicability
to
impedance-related devices
b.
Direct
applicability
to
capacitance-related devices
c.
Direct
applicability
to
voltage-related devices
d.
Direct
applicability
to
resistance-related devices
3.
The early methods in standardization and calibration of dc instruments
using a standard cell-referenced potential difference, developed
across a resistor is known as
a.
The
standard method
b.
The
Poggendorf method
c.
The
Tesla method
d.
The
Edison method
4.
Refer to Figure 1-1. If Es is equal 1.018 volts, R1 is adjusted for
8.0 and R2 is adjusted for 1.3 what is the value of Ex ?
a.
1.1667 volts
b.
0.11667 volts
c.
11.667 volts
d.
116.67 volts
5.
What device is added to the slide wire potentiometer to maintain a
constant current through its calibrated resistance?
a.
Standard cell
b.
Current shunt
c.
Working battery
d.
Rheostat
6.
Refer to Figure 1-2.
What component is adjusted first to provide a
constant current in R1?
a.
Contact slider
b.
Rheostat
c.
Galvanometers
d.
Standard cell
10
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