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Q.

In an AC series circuit, R=10Ω,XL=20Ω and XC=10Ω. Then, choose the correct options

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a

Voltage function will lead the current function

b

Total impedance of the circuit is 102Ω

c

Phase angle between voltage function and current function is 45o

d

Power factor of circuit is 12

answer is A.

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Detailed Solution

(a) XL>XC, hence voltage function will lead the current function.(b) Z=R2+XL−XC2  =(10)2+(20−10)2  =102Ω(c) cos⁡ϕ=RZ=12       Hence, ϕ=45∘ (d) Power factor =cos⁡ϕ=RZ=12
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In an AC series circuit, R=10Ω,XL=20Ω and XC=10Ω. Then, choose the correct options