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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 1: Magnetic Field of a Straight Wire, Circular Coil and Solenoid — Picture questions (exam style)

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  • Questions count: 4
  • Passing grade: 60%
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1.
Two long parallel wires 12 cm apart carry 5 A (wire 1) and 8 A (wire 2) in the same directions (figure). Where is the neutral point?
Two long parallel wires 12 cm apart carry 5 A (wire 1) and 8 A (wire 2) in the same directions (figure). Where is the neutral point?
outside, beside wire 2, 4.62 cm from wire 1
outside, beside wire 1, 4.62 cm from wire 1
between the wires, 4.62 cm from wire 1
between the wires, 6 cm from wire 1
2.
Two long parallel wires 6.00 cm apart carry 6 A and 2 A as shown. Find the magnetic flux density midway between them (μ₀ = 4π×10−7 T m A−1).
Two long parallel wires 6.00 cm apart carry 6 A and 2 A as shown. Find the magnetic flux density midway between them (μ₀ = 4π×10⁻⁷ T m A⁻¹).
6.28×10−5 T
2.67×10−5 T
5.33×10−5 T
9.28×10−5 T
3.
Two long parallel wires 12 cm apart carry 2 A (wire 1) and 6 A (wire 2) in opposite directions (figure). Where is the neutral point?
Two long parallel wires 12 cm apart carry 2 A (wire 1) and 6 A (wire 2) in opposite directions (figure). Where is the neutral point?
outside, beside wire 2, 6 cm from wire 1
between the wires, 4 cm from wire 1
outside, beside wire 1, 4 cm from wire 1
outside, beside wire 1, 6 cm from wire 1
4.
Two long parallel wires 15 cm apart carry 4 A (wire 1) and 16 A (wire 2) in the same directions (figure). Where is the neutral point?
Two long parallel wires 15 cm apart carry 4 A (wire 1) and 16 A (wire 2) in the same directions (figure). Where is the neutral point?
outside, beside wire 2, 12 cm from wire 1
between the wires, 12 cm from wire 1
outside, beside wire 2, 3.75 cm from wire 1
between the wires, 3 cm from wire 1
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