Ohm’s Law

NEET Physics · Current Electricity · 3 questions, latest first

• A wire of resistance 4 Ω is stretched to twice its original length. The resistance of stretched wire would be:20135 May · Q25
• A thermocouple of negligible resistance produces an e.m.f. of 40 μ V /^° C in the linear range of temperature. A galvanometer of…2011Mains · Q96
• A wire of a certain material is stretched slowly by ten per cent. Its new resistance and specific resistance become respectively:2008Prelims · Q29