The correct answer is (C) 4B. Magnetic induction at the center of a circular coil with n turns is given by B′ = n² B. For two turns (n=2), the magnetic induction becomes B′ = 2²B = 4B, quadrupling the ...
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The correct answer is (C) Torsional constant k. Sensitivity of a galvanometer is given by S = nBA/K. Decreasing the torsional constant k increases sensitivity as it reduces the restoring torque per unit twist, allowing greater deflection for a given ...
Three common postures in classical dance are Samabhanga (symmetrical stance), Tribhanga (three bends at neck, torso and knee) and Abhanga (slight sideways tilt). Each posture contributes to storytelling, balance and expressive movement in different Indian classical dance traditions. Class 6 Arts ...
Let the length of each wire be L. For the square, side = L/4; area = (L/4)² = L²/16. For the circle, radius = L/2π; area = π(L/2π)² = L² /4π. Ratio of magnetic moments = L²/4π/L²/16 = 16/4π = ...
Voltage sensitivity is given by ls/R’ where I s is current sensitivity. If current sensitivity increases by 20% and resistance by 25%, voltage sensitivity changes by 120/125 = 0.96, i.e., decreases by 4%. The answer is (D) Decrease by ...