Question

how do you calculate readings on an ammeter? whats the formula?

Answer 1

To read an ammeter, you just look at the number the needle points to. No need for a formula. The units measured is in amperes.

Answer 2

actually an ammeter is no different than a galvanometer except for the extra shunt resistance in parellel.. the pointer (that shows readings) experiences torque due to the galvanometer coil = M X B (mag. moment cross product mag. field)... however, if u'd rather 've a readymade formula, its G/n-1 = S where G is galvno's resistance (main) and S is our shunt, n is the range ratio ( = i max. new /i max. without shunt)...

Answer 3

i have a question here that reads: Each cell has a potential difference of 3 V..Both ammeters A1 and A2 read 1A..The current is switched on for 2 minutes..
in the diagram i have here...i have 2 light bulbs connected in parallel each with their own ammeter (A1 an A2)..i then have a third ammeter (A3) which is copnnected to the others in series...now the actual question is: Calculate the reading on ammeter A3

Answer 4

can u draw it here? it'd be much easier then...