Current Electricity Charging Discharging Of Capacitors Question 268
Question: Voltmeters V1 and V2 are connected in series across a D.C. line. V1 reads 80 volts and has a per volt resistance of 200 ohms. V2 has a total resistance of 32 kilo ohms. The line voltage is
[UPSEAT 2000]
Options:
A) 120 volts
B) 160 volts
C) 220 volts
D) 240 volts
Show Answer
Answer:
Correct Answer: D
Solution:
$ R _{1}=80\times 200=16000,\Omega =16,k\Omega $ Current flowing through $ V _{1} $ = Current flowing through $ V _{2} $ = $ \frac{80}{16\times 10^{3}}=5\times {{10}^{-3}}A $ . So, potential differences across $ V _{2} $ is $ V _{2}=5\times {{10}^{-3}}\times 32\times 10^{3}=160,\text{volt} $ Hence, line voltage $ V=V _{1}+V _{2}=80+160=240V $ .
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