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Answer to Question #61531 in Other Physics for na

Question #61531

16 In the circuit diagram shown, the device marked X is a -----------------
Click here to see exhibit
rheostat
voltmeter
jockey
galvanometer
17 The null condition in potentiometer experiment shows that
the potential difference under test is zero
current is varying in the circuit
potential differences are varying in the circuit
potential difference are balanced
18 The potentiometer wire plays equivalent role of which of these devices in a circuit?
rheostat
thermostat
galvanometer
ammeter
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