WB JEE 2022 | Current Electricity Question 9 | Physics

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

WB JEE 2022 Physics - Current Electricity Question 12 English

A battery of emf E and internal resistance r is connected with an external resistance R as shown in the figure. The battery will act as a constant voltage source if

r << R

r >> R

r = R

It will never act as a constant voltage source.

WB JEE 2022

MCQ (Single Correct Answer)

-0.5

Find the equivalent capacitance between A and B of the following arrangement :

WB JEE 2022 Physics - Current Electricity Question 10 English

$${{2C} \over 3}$$

$${{3C} \over 2}$$

WB JEE 2022

MCQ (Single Correct Answer)

-0.5

Three concentric metallic shells A, B and C of radii a, b and c (a < b < c) have surface charge densities +$$\sigma$$, $$-$$$$\sigma$$ and +$$\sigma$$ respectively. The potential of shell B is

WB JEE 2022 Physics - Current Electricity Question 11 English

$$(a + b + c){\sigma \over {{\varepsilon _0}}}$$

$${{\sigma c} \over {{\varepsilon _0}}}$$

$$\left( {{{{a^2}} \over c} - {{{b^2}} \over c} + c} \right){\sigma \over {{\varepsilon _0}}}$$

$$\left( {{{{a^2}} \over c} - b + c} \right){\sigma \over {{\varepsilon _0}}}$$

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

WB JEE 2021 Physics - Current Electricity Question 13 English

The carbon resistor with colour code is shown in the figure. There is no fourth band in the resistor. The value of the resistance is

24 M$$\Omega$$ $$\pm$$ 20%

14 k$$\Omega$$ $$\pm$$ 5%

24 k$$\Omega$$ $$\pm$$ 20%

34 k$$\Omega$$ $$\pm$$ 10%

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