JEE Advanced_2019_S1 ( Physics 2019 Q-10 ) - Competishun – Live JEE & NEET Courses and Exam Prep

JEE Advanced 2019

Paper-1 2019

Multiple correct answers - Select all that apply

Question

Two identical moving coil galvanometer have $10 \Omega$ resistance and full scale deflection at $2 \mu \mathrm{~A}$ 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 $\mathrm{R}=1000 \Omega$ resistor by using an ideal cell. Which of the following statement(s) is/are correct?

Select ALL correct options:

The measured value of R will be $978 \Omega<\mathrm{R}<982 \Omega$.

The resistance of the Voltmeter will be $100 \mathrm{k} \Omega$.

The resistance of the Ammeter will be $0.02 \Omega$ ( round off to $2^{\text {nd }}$ decimal place)

If the ideal cell is replaced by a cell having internal resistance of $5 \Omega$ then the measured value of R will be more than $1000 \Omega$.

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

⚠ Partially correct. Some answers are missing.

Solution