Grade Upto college level General Physics
(1) In a electrical cable there is a single wire of 9 mm of
copper.Its resistance is 5 ohm. the cable is replaced by 6
different insulated copper wires, the radius of each wire is
3 mm. Now the total resistance of the cable will be ?
(2) Two uniform wires A and B are the same metal and have equal masses.The radius of wire A is twice that of wire B .The total resistance of A and B when connected in parallel is ?
(3) You are given several identical resistance each of value R= 10 ohm and each capable of carrying maximum current of 1 ampere . It is required to make a suitable combination of these resistance to produce a resistance of 5 ohm which can carry a current of 4 amperes .The minnimum number of resistance of the type R that will be required for the job ?
(4) There are three resistance coils of equal resistance . The maximum number of resistances you can obtain by connecting them in any manner you choose being free to use any number of coils in any way is?
(5)How would you esytablish a instantaneous displacement current of A in the space nbetween the two parallel plates of 1muF ?
(6)
