WB JEE 2018 | Current Electricity Question 21 | Physics

WB JEE 2018

MCQ (Single Correct Answer)

-0.25

An electric bulb, a capacitor, a battery and a switch are all in series in a circuit. How does the intensity of light vary when the switch is turn on?

continues to increase gradually

gradually increases for sometime and then becomes steady

sharply rises initially and then gradually decreases

gradually increases for sometime and then gradually decreaes.

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

PREVIOUS NEXT

WB JEE Subjects