WB JEE 2019 | Current Electricity Question 19 | Physics

WB JEE 2019

MCQ (Single Correct Answer)

-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?

WB JEE 2019 Physics - Current Electricity Question 28 English

WB JEE 2019 Physics - Current Electricity Question 28 English

$$15 \times {10^{ - 3}}C$$

$$12 \times {10^{ - 3}}C$$

$$10 \times {10^{ - 3}}C$$

$$3 \times {10^{ - 3}}C$$

WB JEE 2019

MCQ (Single Correct Answer)

-0.25

What is the current I shown in the given circuit?

WB JEE 2019 Physics - Current Electricity Question 27 English

$${V \over {2R}}$$

$${V \over {R}}$$

$${V \over {16R}}$$

$${V \over {8R}}$$

WB JEE 2019

MCQ (Single Correct Answer)

-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?

WB JEE 2019 Physics - Current Electricity Question 26 English

WB JEE 2019 Physics - Current Electricity Question 26 English

2.5$$\Omega $$

3$$\Omega $$

5$$\Omega $$

7.5$$\Omega $$

WB JEE 2019

MCQ (Single Correct Answer)

-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?

WB JEE 2019 Physics - Current Electricity Question 25 English

WB JEE 2019 Physics - Current Electricity Question 25 English

$${1 \over 2}C{E^2}$$

CE²

$${{{E^2}} \over R}$$

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