### General Basic Electronics Questions

#### Meters:

1. A 20 micro-amp meter movement, with an internal resistance (Rm) of 172 ohms, is considered to have a "sensitivity" of _______ ohms per volt.
2. A 50 micro-amp meter movement, with an internal resistance (Rm) of 212 ohms will read _______ v when reading full scale.
3. A 40K ohms per volt meter sensitivity means that the meter will read full scale at what current through the meter? ________ .
4. A voltmeter constructed from a 250 micro-amp movement, will require a total resistance of ______ ohms, to read 60V as a full scale reading.
5. A voltmeter constructed from a 100 micro-amp movement, that has a total resistance of 145K ohms, will require ______ V to read full-scale.

#### Inductance and Capacitance:

1. A 55 micro-henry coil in series with a 12 mhy coil, both of which are in parallel with a 118 micro-henry coil, would result in a total inductance of ________ hy.
2. A 300pf capacitor oin series with a 12pf capacitor would be _____ pf total.
3. The Capacitive Reactance of a 150pf capacitor at 455Khz would be _______ ohms.
4. The Inductive Reactance of a 410mhy inductor at 814 Hz would be _______ ohms.
5. With L1=14mhy, and L2=27mhy, compute both the series and parallel inductance as totals:
Lt(series) = ________  mhy                  Lt(parallel) = ________ mhy
6. With C1=33pf, and C2=4.7pf, compute both the series and parallel capacitance as totals:
Ct(series) = ________ pf                     Ct(parallel) = ________ pf

#### Time Constants:

• A series circuit of a 45mhy inductance, and a 680 ohm resistance, connected across a 12V source would:
• show a CEMF of 6.8V across the inductor at 1.1 Time Constants.
• reach 11.4 ma after 85 microseconds.
• drop to a CEMF of 63.2% of the 12V in 22 microseconds.
• reach 35% of I(max) in 1.05 Time Constants.
• #### Resonance:

• A 150pf capacitor inseries with a 410 mhy inductor will be resonant at _______ Hz.
• A series inductance of 80 micro-henry, and a capacitance of 100pf, would:
• resonate at 1.55Mhz.
• have both XL and XC = 895 ohms at resonance.
• appear as a capacitance at 2.05 Mhz.
• show more voltage across the capacitor than the inductor at 4.77 Mhz.
• #### Conversions:

Fill in all the missing values in the chart below:
 RMS P-P Ave Peak 115V 1800V 440V 75V

#### Properties:

• Resistivity is:
• opposition to change in current flow.
• total opposition to current flow.
• property of a substance that opposes current flow.
• property that resists an Electrostatic Field.
• Reactance is:
• the property that reacts to a Magnetic Field.
• total opposition to Electrostaic-Flux.
• opposition to change in current or voltage.
• opposition to magnetic current flow.
• Reluctance is:
• the property that impedes flux of any kind.
• the total opposition to Electrostatic Flux.
• the amount of opposition to change in flux.
• the total opposition to Magnetic Flux.
• Permeability is:
• the Specific Permeance of a particular substance, compared with that of a vacuum.
• the ease by which an Electrostatic Field may be set up within a substance.
• the number of lines of flux per sq. cm.
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