AP EAPCET 2024 - 21th May Evening Shift | Capacitor Question 4 | Physics

The capacitance of an isolated sphere of radius $r_1$ is increased by 5 times, when it is enclosed by an earthed concentric sphere of radius $r_2$. The ratio of their radii is

$\frac{4}{5}$

$\frac{5}{4}$

$\frac{5}{1}$

$\frac{3}{5}$

AP EAPCET 2024 - 21th May Morning Shift

MCQ (Single Correct Answer)

-0

Two figures are shown as Fig. $A$ and Fig. $B$. The time constant of Fig. $A$ is $\tau_A$ and time constant of Fig. $B$ is $\tau_B$. Then AP EAPCET 2024 - 21th May Morning Shift Physics - Capacitor Question 5 English

AP EAPCET 2024 - 21th May Morning Shift Physics - Capacitor Question 5 English

$\tau_A=\frac{1}{4} \mathrm{~s}$ and $\tau_B=5 \mathrm{~s}$

$\tau_A=\frac{1}{2} \mathrm{~s}$ and $\tau_B=\frac{1}{5} \mathrm{~s}$

$\tau_A=4 \mathrm{~s}$ and $\tau_B=5 \mathrm{~s}$

$\tau_A=\frac{1}{3} \mathrm{~s}$ and $\tau_B=10 \mathrm{~s}$

AP EAPCET 2024 - 20th May Evening Shift

MCQ (Single Correct Answer)

-0

Three parallel plate capacitors of capacitances $4 \mu \mathrm{~F}$, $6 \mu \mathrm{~F}$ and $12 \mu \mathrm{~F}$ are first connected in series and then in parallel. The ratio of the effective capacitances in the two cases is

$1: 11$

$5: 8$

$3: 7$

$4: 9$

AP EAPCET 2024 - 20th May Morning Shift

MCQ (Single Correct Answer)

-0

Two condensers $C_1$ and $C_2$ in a circuit are joined as shown in the figure. The potential of point $A$ is $V_1$ and that of point $B$ is $V_2$. The potential at point $D$ will be AP EAPCET 2024 - 20th May Morning Shift Physics - Capacitor Question 7 English

AP EAPCET 2024 - 20th May Morning Shift Physics - Capacitor Question 7 English

$\frac{1}{2}\left(V_1+V_2\right)$

$\frac{C_2 V_2+C_1 V_2}{C_1+C_2}$

$\frac{C_1 V_1+C_2 V_2}{C_1+C_2}$

$\frac{C_2 V_1-C_1 V_2}{C_1+C_2}$

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