Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
99 Percentile Qs Bank for JEE MainPhysicsCurrent Electricity

The deflection in moving coil galvanometer of resistance 45 falls from 30 divisions to 3 divisions. The length of the shunt wire required to convert galvanometer to ammeter is [specific resistance of material of shunt wire =5 10⁻⁷ m and area of cross- section of wire .=4 10⁻⁷ ~m ² ]

Options

  1. A4 ~m
  2. B6 ~m
  3. C8 ~m
  4. D2 ~m

Correct answer

A. 4 ~m

Step-by-step solution

As per the Question, I_ g = 3 30 I= 1 10 I_ , (I-I_ G ) S=I_ G G (I- 1 10 I) S= 1 10 I G ( 9 10 ) I S=( 1 10 )I G 9 S=G G=45 S=5 S= S L A S A S =L=4 ~m

Practice Current Electricity on Quantrex Academy →

More from Current Electricity

A metal wire of cross-sectional area 0.5 mm ^2 and length 100 m is connected across a battery of e.m.f. 2 V and internal resistance 1 . The density, atomic mass and electrical cond 2026As shown in the figure, the resistance of a galvanometer G can be found by the half-deflection method. Here the resistance R₂ is adjusted such that when the key K is closed the def 2026The stored charge in the capacitor in steady state of the following circuit is ________ C. 2026A moving coil of galvanometer when shunted with 2 , resistance gives a full scale deflection for a current of 500 mA. When a resistance of 470 , is connected in series it gives a f 2026Two cells of emfs 1 V and 2 V and internal resistance 2 , and 1 , , respectively connected in parallel, gave a current of 1 A through an external resistance. If the polarity of one 2026Refer to the circuit diagram given below. The heat generated across the 6 , resistance in 100 second is 100 J. The value of is _______. (Nearest integer) 2026In an experiment to determine the resistance of a given wire using Ohm's law, the voltmeter and ammeter readings are noted as 10 V and 5 A , respectively. The least counts of voltm 2026Under steady state condition the potential difference across the capacitor in the circuit is _______ V. 2026 Full Current Electricity list All 99 Percentile Qs Bank for JEE Main PYQs