WB JEE 2017 | Current Electricity Question 23 | Physics

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

Six wires, each of resistance r, are connected so as to form a tetrahedron. The equivalent resistance of the combination when current enters through one corner and leaves through some other corner is

$${r \over 3}$$

$${r \over 2}$$

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

Consider the circuit shown in the figure.

WB JEE 2017 Physics - Current Electricity Question 18 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 17 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

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