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A 100V voltmeter of internal resistance 20kohm in series with a high resistance R is connected to 110V line.the voltmeter reads 5V ,the value of R is A) 210 kohm B)315 kohm C) 420 kohm D) 4440 kohm |
| Answer» A 100V voltmeter of internal resistance 20kohm in series with a high resistance R is connected to 110V line.the voltmeter reads 5V ,the value of R is A) 210 kohm B)315 kohm C) 420 kohm D) 4440 kohm | |