B A and B are two spheres which carry electric charges. AB
Initially, A has a charge of +2 units and B has a charge of – 1 unit.
What is the direction of the force on (i) A (ii) B? [2]
If 2 units of positive charge are added to both A and B, what will be the direction of the force on (i) A and (ii) B?

What can you increase the strength of an electromagnet by

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

Asquare 1m x 1m plate is shown below. all four of its edges are kept at 0 co. at t=0the temperature distribution is given by: y xtsins n75)=.a) using separation of variables determine the temperature distribution t(x,y,t)along the plate at any time t.b) discretize the heat conduction equation +=22222 txtusing a second-order centered difference scheme for the two second derivatives and a first-order forward euler scheme for the first derivative. using von neumann stability analysis, determine the stability criterion for the proposed discretization scheme in terms of , hand t. solve for the maximum allowable time step tmax