JEE Main 2023 (Online) 30th January Evening Shift | Current Electricity Question 82 | Physics

The equivalent resistance between $A$ and $B$ is _________.

JEE Main 2023 (Online) 30th January Evening Shift Physics - Current Electricity Question 89 English

$\frac{1}{2} \Omega$

$\frac{2}{3} \Omega$

$\frac{3}{2} \Omega$

$\frac{1}{3} \Omega$

JEE Main 2023 (Online) 30th January Morning Shift

MCQ (Single Correct Answer)

-1

The charge flowing in a conductor changes with time as $$\mathrm{Q}(\mathrm{t})=\alpha \mathrm{t}-\beta \mathrm{t}^{2}+\gamma \mathrm{t}^{3}$$. Where $$\alpha, \beta$$ and $$\gamma$$ are constants. Minimum value of current is :

$$\beta-\frac{\alpha^{2}}{3 \gamma}$$

$$\alpha-\frac{3 \beta^{2}}{\gamma}$$

$$\alpha-\frac{\beta^{2}}{3 \gamma}$$

$$\alpha-\frac{\gamma^{2}}{3 \beta}$$

JEE Main 2023 (Online) 29th January Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

With the help of potentiometer, we can determine the value of emf of a given cell. The sensitivity of the potentiometer is

(A) directly proportional to the length of the potentiometer wire

(B) directly proportional to the potential gradient of the wire

(D) inversely proportional to the length of the potentiometer wire