Recent content by varadgautam

How do I calculate the tension at the middle of a rope (weight=W) suspended at two points as a catenary? It's ends make angle A with the horizontal.

Terminal pd of a cell exceeds the emf when the cell is charging.

Consider a statement A: Negation of A (~A) is true Then, ~A: Negation of A is false If A is true, that means that ~A is true too, but these can't be simultaneously true. If A is false, ~~A is true, i.e. A is true. What is the problem?

If the net electric field inside a conductor is zero, how come electrons flow on applying potential difference across it? What force acts on the electrons? We've been taught that an electric field E sets up, so the force on electrons is eE (e=charge on electron). acceleration a=eE/m (m=mass of...

Why doesn't the integration of the general term of an A.P. give its sum? Integration sums up finctions, so if I integrate the general term function of an A.P., I should get its sum. Like 2,4,6,8,... T=2+(n-1)2=2n \int T dn=n^2 ..(1)...

Got it, thanks for the help.

The same thing should happen if I connect the bulb to a single battery, since there too will be excess electrons on the -ve terminal and these will flow through the bulb to the +ve terminal. Let's say the potential of the positive terminal of a battery is V and the potential of the negative...

If I connect the +ve terminal of one battery to a terminal of a bulb and the other terminal of the bulb to the -ve terminal of an other battery, why doesn't it glow? There is still potential difference across the bulb's terminals and so the charge should flow.

By changing I mean +1/2 to -1/2

Is it possible to change the spin of an electron (or any particle) by supplying some energy to it?