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An oscilloscope probe with a 10:1 attenuation factor increases the effective input impedance of the oscilloscope by a factor of:

A0.1
B10
C100
D1

Explanation

A 10:1 passive probe places a 9 M-ohm resistor in series with the scope’s 1 M-ohm input, multiplying input impedance by 10 (to 10 M-ohm).

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