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Two long straight wires are set parallel to each other. Each carries a current in the same direction and the separation between them is 2r. The intensity of the magnetic field mid-way between them is

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Important Questions on Moving Charges and Magnetism

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12th Uttar Pradesh Board
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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 3
Toroid is
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12th Uttar Pradesh Board
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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 4
In the adjacent figure is shown a closed path P. A long straight conductor carrying a current I passes through O and perpendicular to the plane of the paper. Then which of the following holds good?
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12th Uttar Pradesh Board
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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 5
A long hollow copper tube carries current I. Then, which of the following will be true?
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12th Uttar Pradesh Board
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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 6
A long hollow copper tube carries a current I. Then which of the following will be true?
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12th Uttar Pradesh Board
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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 7
A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire? Take, μ0 = 4π×10-7 H/m
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12th Uttar Pradesh Board
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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 8
A long straight wire in the horizontal plane carries a current of 50 A in the north to south direction. Give the magnitude and direction of B at a point 2.5 m east of the wire. Take, μ0=4π×10-7 H/m
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12th Uttar Pradesh Board
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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 9
A horizontal overhead power line carries a current of 90 A in the east to west direction. What is the magnitude and direction of the magnetic field due to the current 1.5 m below the line? Take, μ0 = 4π×10-7 H/m
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12th Uttar Pradesh Board
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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 10
A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.