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ICSE Class 10 Answered

What is the formula to find- Total current Total resistance  Reading of the ammeter  Equivalent resistance  Combination of resistors both in series and parallel  And what happens if voltmeter has high resistance and what do u mean by negligible resistance??  
Asked by sanjeevrao.2704 | 02 May, 2020, 03:05: PM
answered-by-expert Expert Answer
Total current and total resistance can be calculated using ohms lar which is given by
V=IR
V=potential difference
I=current
R=resistance
 
For equivalent resistance
S e r i e s space c o m b i n a t i o n space R equals R subscript 1 plus R subscript 2 plus R subscript 3 P a r a l l e l space c o m b i n a t i o n 1 over R equals 1 over R subscript 1 plus 1 over R subscript 2 plus fraction numerator 1 over denominator R 3 end fraction
Voltmeter has high resistance aas it measures the otential difference between two points and but it should not change the value of current going through these points hence the resistance shuld be kept high.
Negligiblr resistance imlies very smal amount of resistance which cannot alter the amount of current flowing through the circuit significantly.
Answered by Utkarsh Lokhande | 02 May, 2020, 03:35: PM

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