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Series-Parallel Circuits

Q1:

The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is

A 20,000 

B 100,000 

C 200,000 

D 1,000,000 

ANS:B - 100,000 

According to voltmeter sensitivity(ohm/volt),

S=total voltmeter res./ full scale reading=Rm/Vfs.

or, Rm = S*Vfs = 20000*5 = 100,000 ohm.



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