In measuring the current across a resistor using an ammeter, which of the following must be done? Connect the ammeter in series with the resistor. Connect the ammeter in parallel with the resistor. Short circuit the ammeter and adjust the "0A-knob". None of these.

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In measuring the current across a resistor using an ammeter, which of the
following must be done?
Connect the ammeter in series with the resistor.
Connect the ammeter in parallel with the resistor.
Short circuit the ammeter and adjust the "0A-knob".
O None of these.
What is the percentage difference of the total resistance of the three
resistors R1 = 250 Q2, R2 = 350 22 and R3 = 500 2 connected in parallel when
the measured total resistance is 120 2.?
O 1.79%
O 1.82%
O 5.92%
O 6.29%
Transcribed Image Text:In measuring the current across a resistor using an ammeter, which of the following must be done? Connect the ammeter in series with the resistor. Connect the ammeter in parallel with the resistor. Short circuit the ammeter and adjust the "0A-knob". O None of these. What is the percentage difference of the total resistance of the three resistors R1 = 250 Q2, R2 = 350 22 and R3 = 500 2 connected in parallel when the measured total resistance is 120 2.? O 1.79% O 1.82% O 5.92% O 6.29%
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