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Magnetic effect of current questions with solutions
Practice Magnetic effect of current for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
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- MCQmediumMagnetic effect of current
A solenoid of cross-sectional area A and length l is filled with a material of relative permeability 2. If the magnetic field inside the solenoid is B, the magnetic energy stored in the solenoid is:
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JEE Mains 2025 2 April Evening Shift
Open question & full solution → - NumericmediumMagnetic effect of current
The magnetic field at the centre of a wire loop formed by two semicircular wires of radii R₁ = 2π m and R₂ = 4π m carrying current I = 4A as per figure given below is α × 10⁻⁷ T. The value of α is ______. (Centre O is common for all segments)
JEE Mains 2024 27 Jan Evening Shift
Open question & full solution → - MCQmediumMagnetic effect of current
A solenoid contains a core of relative permeability μᵣ = 400. The magnetic field inside the solenoid is 1.0 T. If the magnetic field intensity is written as H = α×10⁵ A·m⁻¹ and μ₀ = 4π×10⁻⁷ T·m·A⁻¹, what is α?
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JEE Mains 2026 4 April Evening Shift
Open question & full solution → - MCQeasyMagnetic effect of current
A solenoid of 1200 turns is wound uniformly in a single layer on a glass tube 2 m long and 0.2 m in diameter. The magnetic intensity at the center of the solenoid when a current of 2 A flows through it is:
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JEE Mains25 January 2023Morning Shift
Open question & full solution → - MCQeasyMagnetic effect of current
In a co-axial straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero:
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JEE Mains 2024 05 Apr Morning Shift
Open question & full solution → - NumericmediumMagnetic effect of current
Two parallel long current carrying wire separated by a distance 2r are shown in the figure. The ratio of magnetic field at A to the magnetic field produced at C is x/7. The value of x is ______.
JEE Mains 2024 04 Apr Evening Shift
Open question & full solution → - MCQeasyMagnetic effect of current
Q42. A cube of side 1 mm is placed at the centre of a circular current loop of radius 10 cm carrying a current of 2 A. Assuming the magnetic field is effectively uniform over the small cube, the magnetic energy stored inside the cube is α×10⁻¹⁴ J. Taking μ₀ = 4π×10⁻⁷ T·m·A⁻¹ and π = 3.14, what is α?
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JEE Mains 2026 6 April Morning Shift
Open question & full solution → - NumericmediumMagnetic effect of current
Two circular coils P and Q of 100 turns each have same radius of π cm. The currents in P and R are 1 A and 2 A respectively. P and Q are placed with their planes mutually perpendicular with their centers coincide. The resultant magnetic field induction at the center of the coils is √x mT, where x =_________. [Use μ₀ = 4π × 10⁻⁷ T m A⁻¹]
JEE Mains 2024 31 Jan Evening Shift
Open question & full solution → - NumericmediumMagnetic effect of current
A moving coil galvanometer has 100 turns and each turn has an area of 2.0 cm². The magnetic field produced by the magnet is 0.01 T and the deflection in the coil is 0.05 radian when a current of 10 mA is passed through it. The torsional constant of the suspension wire is x × 10⁻⁵ N m/rad. The value of x is ____.
JEE Mains 2024 01 Feb Evening Shift
Open question & full solution → - IntegermediumMagnetic effect of current
A particle of mass 5 mg and charge 5π×10⁻⁶ C moves with velocity v = (3î+2k̂)×10⁻² m·s⁻¹ in a uniform magnetic field B = 0.1k̂ T. The particle follows a helical path. How far does it move in the +k̂ direction while completing 5 revolutions? Give the answer in metres.
JEE Mains 2026 8 April Evening Shift
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