JEE Main 2016PhysicsCurrent ElectricityEasyMCQ

JEE Main 2016 — Current Electricity Question with Solution

JEE Main 2016 (10 Apr Online)

Question

A galvanometer has a 50 division scale. Battery has no internal resistance. It is found that there is deflection of 40 divisions when R.B.=2400 Ω. Deflection becomes 20 divisions when resistance taken from resistance box is 4900 Ω. Then we can conclude :



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Correct answer
ACurrent sensitivity of galvanometer is 20 μA/division

Step-by-step explanation

Current in the circuit,

I=V2400+RG and I2=V4900+RG

⇒RG=100Ω

I=22500=8×10-4A

Current Sensitivity =8×10-440

20μA per division

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About this question

This is a previous-year question from JEE Main 2016, covering the Current Electricity chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.