when we put a voltmeter in a circuit , why it should be put parallel to the electric current and there should be a resistor between the joining points of voltmeter ?

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Solution

Dear Student ,
$V o l t m e t e r h a s v e r y h i g h r e s i s \tan c e t o e n s u r e t h a t i t' s c o n n e c t i o n d o n o t a l t e r f l o w o f c u r r e n t i n t h e c i r c u i t . N o w i f i t i s c o n n e c t e d i n s e r i e s t h e n n o c u r r e n t w i l l b e t h e r e i n t h e c i r c u i t d u e t o i t' s h i g h r e s i s \tan c e . H e n c e i t i s c o n n e c t e d i n p a r a l l e l t o t h e l o a d a c r o s s w h i c h p o t e n t i a l d i f f e r e n c e i s t o b e m e a s u r e d .$
Regards

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