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Current Electricity question

2019 · Shift 1 · Q47
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Current Electricity question

2019 · Shift 1 · Q47

JEE AdvancedPhysicsCurrent ElectricityMultiple correct+4 / −1
Two identical moving coil galvanometers have 10 Ω\OmegaΩ resistance and full scale deflection at 2 μ\muμ A current. One of them is converted into a voltmeter of 100 mV full scale reading and the other into an ammeter of 1 mA full scale current using appropriate resistors. These are then used to measure the voltage and current in the Ohm's law experiment with R = 1000 Ω\OmegaΩ resistor by using an ideal cell. Which of the following statement(s) is/are correct?
  1. A
    The resistance of the voltmeter will be 100 k Ω\OmegaΩ.
  2. B
    The resistance of the ammeter will be 0.02 Ω\OmegaΩ (round off to 2nd decimal place).
  3. C
    If the ideal cell is replaced by a cell having internal resistance of 5 Ω\OmegaΩ then the measured value of R will be more than 1000 Ω\OmegaΩ.
  4. D
    The measured value of R will be 978 Ω\OmegaΩ < R < 982 Ω\OmegaΩ.
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