Q20.A conductor lies along the z-axis at −1.5 ≤z < 1.5 m and carries a fixed current of 10.0 A in −ˆaz direction → (see figure). For a field B = 3.0 × 10−4 e−0.2x ˆay T, find the power required to move the conductor at constant speed to x = 2.0 m, y = 0 m in 5 × 10−3 s. Assume parallel motion along the x-axis. (1) 1.57 W (2) 2.97 W (3) 14.85 W (4) 29.7 W
What This Question Tests
This multi-concept problem requires calculating the magnetic force on a current-carrying wire, integrating to find the work done by this force, and then determining the average power.
Concepts Tested
Formulas Used
F = I(L × B)
P = W/t
W = ∫ F ⋅ dx
📚 NCERT Sections This Tests
4.6 — A 3.0 Cm Wire Carrying A Current Of 10 A Is Placed Inside A Solenoid
Physics Class 11 · Chapter 4
4.6 A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the wire?
4.4 — A Horizontal Overhead Power Line Carries A Current Of 90 A In East To
Physics Class 11 · Chapter 4
4.4 A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of the magnetic field due to the current 1.5 m below the line?
4.7 — Two Long And Parallel Straight Wires A And B Carrying Currents Of
Physics Class 11 · Chapter 4
4.7 Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A.
📋 Question Details
- Chapter
- Magnetic Effects of Current
- Topic
- Force on a current carrying conductor in magnetic field
- Year
- 2014
- Shift
- 06 Apr
- Q Number
- Q20
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 4: Moving Charges and Magnetism
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