1
WB JEE 2019
+1
-0.25
Five identical capacitors, of capacitance 20$$\mu$$F each, are connected to a battery of 150V, in a combination as shown in the diagram. What is the total amount of charge stored?

A
$$15 \times {10^{ - 3}}C$$
B
$$12 \times {10^{ - 3}}C$$
C
$$10 \times {10^{ - 3}}C$$
D
$$3 \times {10^{ - 3}}C$$
2
WB JEE 2019
+1
-0.25
What is the current I shown in the given circuit?

A
$${V \over {2R}}$$
B
$${V \over {R}}$$
C
$${V \over {16R}}$$
D
$${V \over {8R}}$$
3
WB JEE 2019
+1
-0.25
When the value of R in the balanced Wheatstone bridge, shown in the figure, is increased from 5$$\Omega$$ to 7$$\Omega$$, the value of S has to be increased by 3$$\Omega$$ in order to maintain the balance. What is the initial values of S?

A
2.5$$\Omega$$
B
3$$\Omega$$
C
5$$\Omega$$
D
7.5$$\Omega$$
4
WB JEE 2019
+2
-0.5
A capacitor of capacitance C is connected in series with a resistance R and DC source of emf E through a key. The capacitor starts charging when the key is closed. By the time the capacitor has been fully charged, what amount of energy is dissipated in the resistance R?

A
$${1 \over 2}C{E^2}$$
B
0
C
CE2
D
$${{{E^2}} \over R}$$
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