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Physics

Chapter 1 - Electric Current, Ohms Law and Kirchhoffs Laws

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Chapter 2 - Magnetic Effects of Electric Current and Measuring Instruments

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Chapter 3 - Electromagnetic Induction and AC Dynamo and Transformer

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Chapter 4 - Alternating Current AC Circuits

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Chapter 5 - Dual Nature of Wave and Particle

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Chapter 6 - Atomic Spectra and X-Rays

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Chapter 7 - Lasers and Principles

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Chapter 8 - Modern Electronics and Semiconductors

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Quiz

Lesson 2: Magnetic Force on Currents, Torque and Magnetic Dipole Moment — Picture questions (exam style)

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1.
A 0.4 m wire is bent once into a square loop and once into a circular loop, carrying 2 A in a 0.1 T field with the loop plane at 0° to the field. Which option is correct?
A 0.4 m wire is bent once into a square loop and once into a circular loop, carrying 2 A in a 0.1 T field with the loop plane at 0° to the field. Which option is correct?
torque on square = 2.00×10−3 N m, ratio circle : square = 1
torque on square = 8.00×10−3 N m, ratio circle : square = 1
torque on square = 2.00×10−3 N m, ratio circle : square = 1.27
torque on square = 2.00×10−3 N m, ratio circle : square = 0.785