An AC voltage source of variable angular freq | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The impedance $Z$ of the $RC$ series circuit is given by $Z = \sqrt{R^2 + X_C^2}$,where $X_C = \frac{1}{\omega C}$ is the capacitive reactance.As

Vedclass · Accepted Answer

The bulb glows brighter

Vedclass · Answer

(B) The impedance $Z$ of the $RC$ series circuit is given by $Z = \sqrt{R^2 + X_C^2}$,where $X_C = \frac{1}{\omega C}$ is the capacitive reactance.As the angular frequency $\omega$ increases,the capacitive reactance $X_C = \frac{1}{\omega C}$ decreases.Since $Z = \sqrt{R^2 + X_C^2}$,a decrease in $X_C$ leads to a decrease in the total impedance $Z$ of the circuit.The rms current in the circuit is given by $I_{rms} = \frac{V_{rms}}{Z}$. As $Z$ decreases,$I_{rms}$ increases.The power dissipated by the bulb is $P = I_{rms}^2 R$. Since $I_{rms}$ increases,the power $P$ increases,which means the bulb glows brighter.

Column-$I$	Column-$II$
$(a)$ $Oscillatoria$	$(p)$ $Prothallus$
$(b)$ $Cycas$	$(q)$ $Cell$ $wall$ $contains$ $chitin$ $mixed$ $with$ $cellulose$
$(c)$ $Dryopteris$	$(r)$ $Primitive$ $flowers$
$(d)$ $Yeast$	$(s)$ $Food$ $stored$ $as$ $starch$

An $AC$ voltage source of variable angular frequency $\omega$ and fixed amplitude $V_0$ is connected in series with a capacitance $C$ and an electric bulb of resistance $R$ (inductance zero). When $\omega$ is increased:

Similar Questions

If $^nP_4 = 30 \times ^nC_5$,then $n = \dots$

Match the following columns:
Column-$I$ Column-$II$
$(a)$ $Oscillatoria$ $(p)$ $Prothallus$
$(b)$ $Cycas$ $(q)$ $Cell$ $wall$ $contains$ $chitin$ $mixed$ $with$ $cellulose$
$(c)$ $Dryopteris$ $(r)$ $Primitive$ $flowers$
$(d)$ $Yeast$ $(s)$ $Food$ $stored$ $as$ $starch$

$A$ sample of $0.1 \ g$ of water at $100^{\circ} C$ and normal pressure $(1.013 \times 10^5 \ N m^{-2})$ requires $54 \ cal$ of heat energy to convert to steam at $100^{\circ} C$. If the volume of the steam produced is $167.1 \ cc$,the change in internal energy of the sample is ....... $J$.

The intercepts on the $x$-axis made by the tangents to the curve $y = \int_0^x |t| dt, x \in R$ which are parallel to the line $y = 2x$ are equal to:

In the standing wave shown,particles at the positions $A$ and $B$ have a phase difference of

Vedclass Test Series

Exam Paper Generator

Online Exam Module