WB JEE 2017 | Current Electricity Question 24 | Physics

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

Consider the circuit shown in the figure.

WB JEE 2017 Physics - Current Electricity Question 20 English

The value of the resistance X for which the thermal power generated in it is practically independent of small variation of its resistance is

X = R

X = $${R \over 3}$$

X = $${R \over 2}$$

X = 2R

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

WB JEE 2017 Physics - Current Electricity Question 19 English

Consider the circuit shown in the figure where all the resistances are of magnitude 1 k$$\Omega$$. If the current in the extreme right resistance X is 1 mA, the potential difference between A and B is

34 V

21 V

68 V

55 V

WB JEE 2017

MCQ (Single Correct Answer)

-0.5

Consider the circuit given here. The potential difference V_BC between the points B and C is

WB JEE 2017 Physics - Current Electricity Question 14 English

WB JEE 2017 Physics - Current Electricity Question 14 English

1 V

0.5 V

0 V

$$-$$ 1 V

WB JEE 2016

MCQ (Single Correct Answer)

-0.25

Two wires of same radius having lengths l₁ and l₂ and resistivities $${{\rho _1}}$$ and $${{\rho _2}}$$ are connected in series. The equivalent resistivity will be

$${{{\rho _1}{l_2} + {\rho _2}{l_1}} \over {{\rho _1} + {\rho _2}}}$$

$${{{\rho _1}{l_1} + {\rho _2}{l_2}} \over {{l_1} + {l_2}}}$$

$${{{\rho _1}{l_1} - {\rho _2}{l_2}} \over {{l_1} - {l_2}}}$$

$${{{\rho _1}{l_2} + {\rho _2}{l_1}} \over {{l_1} + {l_2}}}$$

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