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A copper wire of radius 0.1 mm and resistance 1 kW is connected across a power supply of 20 V.(a) How many electrons are transferred per second between the supply and the wire at one end ?(b) Write down the current density in the wire.Correct answer is '1.25 × 10_17, (b)  × 106 A/m2'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A copper wire of radius 0.1 mm and resistance 1 kW is connected across a power supply of 20 V.(a) How many electrons are transferred per second between the supply and the wire at one end ?(b) Write down the current density in the wire.Correct answer is '1.25 × 10_17, (b)  × 106 A/m2'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A copper wire of radius 0.1 mm and resistance 1 kW is connected across a power supply of 20 V.(a) How many electrons are transferred per second between the supply and the wire at one end ?(b) Write down the current density in the wire.Correct answer is '1.25 × 10_17, (b)  × 106 A/m2'. Can you explain this answer?.

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