Questions
A d.c. supply of 120V is connected to a large resistance . A voltmeter of resistance placed in series in the circuit reads 4V. What is the value of ?
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a
190kΩ
b
90kΩ
c
290kΩ
d
390kΩ
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Correct option is C
Given, across voltmeter V=IR⇒4=(120 VX+10kΩ)(10kΩ)⇒X=290kΩSimilar Questions
An ideal ammeter (zero resistance) and an ideal voltmeter (infinite resistance) are connected as shown. The ammeter reading is given as and E=20 V
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