how do i show the formulae used :confused:

can someone show me how to draw a diagram including componenet values plz

cheers.

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- Dec 11th 2006, 12:29 PMturbod15b5 mA, 50 mV 10ohms, could be used to measure a current.
how do i show the formulae used :confused:

can someone show me how to draw a diagram including componenet values plz

cheers. - Dec 11th 2006, 01:01 PMtopsquark
- Dec 11th 2006, 02:41 PMturbod15b
show, with the aid of a

__simple hand drawn diagram including component values__, how a meter movement labelled:**5mA, 50 mV, 10 ohms**, could be used to measure a current of**1A**in a circuit.

clearly show the, to calculate the necessary component values**formulae used,**&**working out required**

:confused: - Dec 12th 2006, 03:05 AMearboth
Hello,

to measure the current you have to use a shunt which divides the current into two branches: The smaller amount (here 5 mA) passes through the meter, the bigger amount (here: 995 mA) passes through the resistor. See attachment.

Formulae in a parallel circuit:

math]U_{total}=U_1=U_2=...[/tex]

math]I_{total}=I_1+I_2+...[/tex]

math]\frac{1}{R_{total}}=\frac{1}{R_1}+\frac{1}{R_2}+.. .[/tex]

You can take the results for your problem from the sketch.

EB

PS:: I've made a mistake typing Latex code but I couldn't find it. So I send you this reply as plain text. Hope it is useful nevertheless.