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Concept: undefined >> undefined
Concept: undefined >> undefined
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A conic surface is placed in a uniform electric field E as shown in the figure such that the field is perpendicular to the surface on the side AB. The base of the cone is of radius R, and the height of the cone is h. The angle of the cone is θ.
Find the magnitude of the flux that enters the cone's curved surface from the left side. Do not count the outgoing flux (θ < 45°)
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The AC voltage across a resistance can be measured using a ______.
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The deflection in a moving coil galvanometer is ______.
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The current sensitivity of a galvanometer is defined as ______.
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The unit of electric dipole moment is ______.
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In a moving coil galvanometer the deflection (Φ) on the scale by a pointer attached to the spring is ______.
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A moving coil galvanometer can be converted into an ammeter by ______.
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The conversion of a moving coil galvanometer into a voltmeter is done by ______.
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An electric dipole of moment p is placed parallel to the uniform electric field. The amount of work done in rotating the dipole by 90° is ____________.
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The coil of a moving coil galvanometer is wound over a metal frame in order to ______.
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The current sensitivity of a galvanometer increase by 20%. If its resistance also increases by 25%, the voltage sensitivity will ______.
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Assertion (A): On Increasing the current sensitivity of a galvanometer by increasing the number of turns may not necessarily increase its voltage sensitivity.
Reason (R): The resistance of the coil of the galvanometer increases on increasing the number of turns.
Select the most appropriate answer from the options given below:
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Two charges –q each are fixed separated by distance 2d. A third charge q of mass m placed at the mid-point is displaced slightly by x(x << d) perpendicular to the line joining the two fixed charged as shown in figure. Show that q will perform simple harmonic oscillation of time period.
`T = [(8pi^3 ε_0 md^3)/q^2]^(1/2)`
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Figure shows some equipotential lines distributed in space. A charged object is moved from point A to point B.
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| (i) | (ii) | (iii) |
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