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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?

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...

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

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...

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

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!

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...

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

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.