Current Electricity and Electrical InstrumentHard
Question
A resistance of 2 Ω is connected across one gap of a metre-bridge (the length of the wire is 100 cm) and an unknown resistance, greater than 2Ω, is connected across the other gap. When these resistance are interchanged, the balance point shifts by 20 cm. Neglecting any corrections, the unknown resistance is
Options
A.3 Ω
B.4 Ω
C.5 Ω
D.6 Ω
Solution
......(i)
......(ii)Solving (i) and (ii) x = 3Ω
Create a free account to view solution
View Solution FreeTopic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions
More Current Electricity and Electrical Instrument Questions
In a potentiometer wire experiment the emf of a battery in the primary circuit is 20volt and its internal resistance is ...A wire has a non-uniform cross-section as shown in figure. A steady current flows through it. The drift speed of electro...A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pi...Two weirs each of radius cross section r but of different materials are connected to gather end to end (in series). If t...A cell of internal resistance 1Ω is connected across a resister. A voltmeter having variable resistance is used to ...