1
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.25
Change Language
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?

WB JEE 2019 Physics - Current Electricity Question 20 English
A
2.5$$\Omega $$
B
3$$\Omega $$
C
5$$\Omega $$
D
7.5$$\Omega $$
2
WB JEE 2019
MCQ (Single Correct Answer)
+2
-0.5
Change Language
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?

WB JEE 2019 Physics - Current Electricity Question 19 English
A
$${1 \over 2}C{E^2}$$
B
0
C
CE2
D
$${{{E^2}} \over R}$$
3
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Four resistors, 100$$\Omega $$, 200$$\Omega $$, 300$$\Omega $$ and 400$$\Omega $$ are connected to form four sides of a square. The resistors can be connected in any order. What is the maximum possible equivalent resistance across the diagonal of the square?
A
210$$\Omega $$
B
240$$\Omega $$
C
300$$\Omega $$
D
250$$\Omega $$
4
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
What will be current through the 200$$\Omega $$ resistor in the given circuit, a long time after the switch K is made on?

WB JEE 2018 Physics - Current Electricity Question 16 English
A
Zero
B
100 mA
C
10 mA
D
1 mA
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