The figure below shows the electric field lines due to two positive charges. The magnitudes EA, EB and Ec of the electric fields at points A, B and C respectively are related as

Question:

Options :

a) 7.27 x 10⁻⁴C/m
b) 7.98 x 10⁻⁴C/m
c) 7.11 x 10⁻⁴C/m
d) 7.04 x 10⁻⁴C/m

Answer :

b) 7.98 x 10⁻⁴C/m

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Solution :-

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If a body is executing simple harmonic motion then

Two simple harmonic motions of angular frequency 100 rad/sec and 1000 rad/s have the same displacement amplitude. The ratio of their maximum acceleration is

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Forty electric bulbs are connected in series across a 220 V supply. After one bulb is fused, the remaining 39 are connected again in series across the same supply. The illumination will be

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