Question 275: Current Electricity

Question

The resistance of a galvanometer is 50 ohm and
the maximum current which can be passed
through it is 0.002 A. What resistance must be
connected to it in order to convert it into an
ammeter of range 0 – 0.5 A ?

Accepted Answer

We have
I
g
R
g
= (0.5 Ã¢ÂÂ I
g
) S
$$ \Rightarrow $$ (0.002) (50) = (0.5 Ã¢ÂÂ I
g
) S
$$ \Rightarrow S \simeq {{0.002 	imes 50} \over {0.5}} = 0.2\Omega $$

Answer

0.02 ohm

Answer

0.2 ohm

Answer

0.002 ohm

Answer

0.5 ohm

Current Electricity

The resistance of a galvanometer is 50 ohm and the maximum current which can be passed through it is 0.002 A. What resistance must be connected to it in order to convert it into an ammeter of range 0 – 0.5 A ?

Choose the correct answer: