JEE Main 2022 (Online) 24th June Evening Shift | Current Electricity Question 143 | Physics

What will be the most suitable combination of three resistors A = 2$$\Omega$$, B = 4$$\Omega$$, C = 6$$\Omega$$ so that $$\left( {{{22} \over 3}} \right)$$$$\Omega$$ is equivalent resistance of combination?

Parallel combination of A and C connected in series with B.

Parallel combination of A and B connected in series with C.

Series combination of A and C connected in parallel with B.

Series combination of B and C connected in parallel with A.

JEE Main 2022 (Online) 24th June Morning Shift

MCQ (Single Correct Answer)

-1

Two identical cells each of emf 1.5 V are connected in parallel across a parallel combination of two resistors each of resistance 20 $$\Omega$$. A voltmeter connected in the circuit measures 1.2 V. The internal resistance of each cell is :

2.5 $$\Omega$$

4 $$\Omega$$

5 $$\Omega$$

10 $$\Omega$$

JEE Main 2021 (Online) 1st September Evening Shift

MCQ (Single Correct Answer)

-1

Due to cold weather a 1 m water pipe of cross-sectional area 1 cm² is filled with ice at $$-$$10$$^\circ$$C. Resistive heating is used to melt the ice. Current of 0.5A is passed through 4 k$$\Omega$$ resistance. Assuming that all the heat produced is used for melting, what is the minimum time required? (Given latent heat of fusion for water/ice = 3.33 $$\times$$ 10⁵ J kg^$$-$$1, specific heat of ice = 2 $$\times$$ 10³ J kg^$$-$$1 and density of ice = 10³ kg/m³

0.353 s

35.3 s

3.53 s

70.6 s

JEE Main 2021 (Online) 1st September Evening Shift

MCQ (Single Correct Answer)

-1

Two resistors R₁ = (4 $$\pm$$ 0.8) $$\Omega$$ and R₂ = (4 $$\pm$$ 0.4) $$\Omega$$ are connected in parallel. The equivalent resistance of their parallel combination will be :

(4 $$\pm$$ 0.4) $$\Omega$$

(2 $$\pm$$ 0.4) $$\Omega$$

(2 $$\pm$$ 0.3) $$\Omega$$

(4 $$\pm$$ 0.3) $$\Omega$$

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