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    A paradox about Drift Velocity

    Thank you for your reply! I however, still am not completely clear. If the electrons' drift velocity is low, how is the current moving so fast? Aren't electrons supposed to carry charge and therefore current themselves?
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    A paradox about Drift Velocity

    Hi! I was just reading about drift speed and I read that the speed is about 10^-4m/s. It then struck me that if electricity is carried by electrons, then in a given circuit, how is the light bulb lighting up so quickly when according to my calculations the time taken to travel 0.5 metres for...
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    Swinging bob

    Thanks!! Wow, it all seems to fall into place now.
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    Swinging bob

    Thanks for the replies! Dadface, Thus, ((mv^2)/r)sinx = mg. Even if it is agreed that perfectly horizontal isn't possible (till the speed is infinity), when we swing the bob, it does seem to be close to the eye. Thus, x is small (4-5 degrees at the most?). Thus, isn't x too small for sinx to...
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    Swinging bob

    Help? I am really feeling very anxious... Could it be air molecules?
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    Swinging bob

    Thanks for the reply! But then how does it keep moving in a "straight" circle? Why doesn't it become a cone shaping circle? Thanks!
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    Swinging bob

    Hi! I was just wondering regarding this. When we swing a bob tied to a thread, completely perpendicular to the vertical wall (that is, parallel to the floor), what force balances the weight of the bob? I don't think it can be mv^2/r because that centripetal force is perpendicular to the...
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    A little doubt

    Sorry i didnt get it still..i tried to draw a table but i got lost in the way.. Could you please elaborate? Thanks!
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    A little doubt

    1. A thermometer is calibrated wrongly. At the melting point, it reads -10 degree celsius. At 50 degree celsius, it reads 60 degree celsius. What does the thermometer read at the boiling point? 2. I think this is logic-based. 3. I drew a table but got confused.
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