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CBSE Class 10 Answered

Four resistors of 2 ohm each are first connected in series and then in parallel with a battery, Find the ratio of electric current in series and parallel connection
Asked by saradamahapatra9999 | 10 Dec, 2019, 10:08: AM
answered-by-expert Expert Answer
 
When the resistors are connected in series, 
Rs = R1 + R2 + R3 + R
Thus, 
Rs = 2 x 4 =8 Ω 
 
When the resistors are connected in parallel, 
 
 
By Ohm's law, 
V = IR 
 
For series combination, Vs = Is Rs ... (1)
For parallel combination, Vp = Ip Rp ... (2)
 
Given : Vs = Vp ... (3) 
From (1), (2) and (3), 

 
 
Thus, the ratio of electric current in series to parallel is, 
Is : Ip = 1:16
 
Answered by Shiwani Sawant | 10 Dec, 2019, 03:20: PM
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