Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12

# An Inductor, a Resistance and a Capacitor Are Joined in Series with an Ac Source. as the Frequency of the Source is Slightly Increased from a Very Low Value, the Reactance - Physics

MCQ

An inductor, a resistance and a capacitor are joined in series with an AC source. As the frequency of the source is slightly increased from a very low value, the reactance

#### Options

• of the inductor increases

• of the resistor increases

•  of the capacitor increases

• of the circuit increases

#### Solution

of the inductor increases

The reactance of an inductor is given by,
X_L = omegaL

And the reactance of a capacitor is given by,
Xc = 1/(omegaC)
Here, ω = 2πf , where f is the frequency of the source. So, when f increases, ω increases.
∴ XL will increase and XC will decrease.

Concept: Ac Voltage Applied to an Inductor
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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 17 Alternating Current
MCQ | Q 1 | Page 329