A-003-06: Meters, multimeter, power meter
A-003-06-01:
A meter has a full-scale deflection of 40 microamps and an internal resistance of 96 ohms. You want it to read 0 to 1 mA. The value of the shunt to be used is:
4 ohms
24 ohms
16 ohms
40 ohms
A-003-06-02:
A moving-coil milliammeter having a full-scale deflection of 1 mA and an internal resistance of 0.5 ohms is to be converted to a voltmeter of 20 volts full-scale deflection. It would be necessary to insert a:
series resistance of 19 999.5 ohms
series resistance of 1 999.5 ohms
shunt resistance of 19 999.5 ohms
shunt resistance of 19.5 ohms
A-003-06-03:
A voltmeter having a range of 150 volts and an internal resistance of 150 000 ohms is to be extended to read 750 volts. The required multiplier resistor would have a value of:
600 000 ohms
1 500 ohms
750 000 ohms
1 200 000 ohms
A-003-06-04:
The sensitivity of an ammeter is an expression of:
the amount of current causing full-scale deflection
the resistance of the meter
the loading effect the meter will have on a circuit
the value of the shunt resistor
A-003-06-05:
Voltmeter sensitivity is usually expressed in ohms per volt. This means that a voltmeter with a sensitivity of 20 kilohms per volt would be a:
50 microampere meter
1 milliampere meter
50 milliampere meter
100 milliampere meter
A-003-06-06:
The sensitivity of a voltmeter, whose resistance is 150 000 ohms on the 150-volt range, is:
1000 ohms per volt
100 000 ohms per volt
10 000 ohms per volt
150 ohms per volt
A-003-06-07:
The range of a DC ammeter can easily be extended by:
connecting an external resistance in parallel with the internal resistance
connecting an external resistance in series with the internal resistance
changing the internal inductance of the meter
changing the internal capacitance of the meter to resonance
A-003-06-08:
What happens inside a multimeter when you switch it from a lower to a higher voltage range?
Resistance is added in series with the meter
Resistance is reduced in series with the meter
Resistance is reduced in parallel with the meter
Resistance is added in parallel with the meter
A-003-06-09:
How can the range of an ammeter be increased?
By adding resistance in parallel with the meter
By adding resistance in series with the circuit under test
By adding resistance in parallel with the circuit under test
By adding resistance in series with the meter
A-003-06-10:
Where should an RF wattmeter be connected for the most accurate readings of transmitter output power?
At the transmitter output connector
One-half wavelength from the transmitter output
One-half wavelength from the antenna feed point
At the antenna feed point
A-003-06-11:
At what line impedance do most RF wattmeters usually operate?
50 ohms
25 ohms
100 ohms
300 ohms
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