1
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
The figure shows an experimental plot for discharging of a capacitor in an R-C circuit. The time constant $$\tau$$ of this circuit lies between
A
100 sec and 150 sec
B
0 and 50 sec
C
50 sec and 100 sec
D
150 sec and 200 sec
2
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
A parallel plate capacitor with air between the plates has capacitance of $$9$$ $$pF.$$ The separation between its plates is $$'d'.$$ The space between the plates has dielectric constant $${k_1}$$ $$=3$$ and thickness $${d \over 3}$$ while the other one has dielectric constant $${k_2} = 6$$ and thickness $${{2d} \over 3}$$. Capacitance of the capacitor is now
A
$$1.8$$ $$pF$$
B
$$45$$ $$pF$$
C
$$40.5$$ $$pF$$
D
$$20.25$$ $$pF$$
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
A parallel plate capacitor is made by stacking $$n$$ equally spaced plates connected alternatively. If the capacitance between any two adjacent plates is $$'C'$$ then the resultant capacitance is
A
$$\left( {n + 1} \right)C$$
B
$$\left( {n - 1} \right)C$$
C
$$nC$$
D
$$C$$
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
A fully charged capacitor has a capacitance $$'C'$$. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity $$'s'$$ and mass $$'m'.$$ If the temperature of the block is raised by $$'\Delta T',$$ the potential difference $$'v'$$ across the capacitance is
A
$${{mCAT} \over s}$$
B
$$\sqrt {{{2mCAT} \over s}}$$
C
$$\sqrt {{{2msAT} \over C}}$$
D
$${{ms\Delta T} \over C}$$
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