مقناطیسی میدان میں منتقل ہونے والے چارج پر کام کرنے والی طاقت کا انحصار _____ نہیں ہوگا؟
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A. Its mass
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B. Amount of charge
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C. None of these
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D. Intensity of the magnetic field
Explanation
- The magnetic force on a moving charge is given by F = qvB sinθ, where q is the charge, v is velocity, and B is the magnetic field intensity.
- Mass (m) does not appear in this equation, so the force is independent of the charge's mass.
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A. 1:2
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B. 4:1
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C. None of these
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D. 2:1
Explanation
- The kinetic energy gained by a charged particle in an electric field is given by KE = qV, where q is charge and V is the potential difference.
- Since kinetic energy is also KE = ½ mV², equating both expressions gives V = √(2qV/m).
- For particle A (q) and particle B (4q), their velocities will be VA = √(2qV/m) and VB = √(8qV/m).
- Taking the ratio: VA/VB = √(2qV/m) / √(8qV/m) = 1/2.
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