MHT CET 2023 11th May Morning Shift | Current Electricity Question 52 | Physics

In potentiometer experiments, two cells of e. m. f. '$$E_1$$' and '$$E_2$$' are connected in series $$\left(E_1>E_2\right)$$, the balancing length is $$64 \mathrm{~cm}$$ of the wire. If the polarity of $$E_2$$ is reversed, the balancing length becomes $$32 \mathrm{~cm}$$. The ratio $$\mathrm{E}_1 / \mathrm{E}_2$$ is

$$3: 2$$

$$2: 3$$

$$1: 3$$

$$3: 1$$

MHT CET 2023 10th May Evening Shift

MCQ (Single Correct Answer)

-0

In meter bridge experiment, null point was obtained at a distance '$$l$$' from left end. The values of resistances in the left and right gap are doubled and then interchanged. The new position of the null point is

$$(100-l)$$

$$(100-2 l)$$

$$(100-3 l)$$

$$\left(100-\frac{l}{2}\right)$$

MHT CET 2023 10th May Evening Shift

MCQ (Single Correct Answer)

-0

A galvanometer has resistance '$$\mathrm{G}$$' and range '$$\mathrm{V} g$$'. How much resistance is required to read voltage upto '$$\mathrm{V}$$' volt?

$$\mathrm{G}\left(\frac{\mathrm{V}}{\mathrm{V}_{\mathrm{g}}}-1\right)$$

$$\mathrm{G}\left(\frac{\mathrm{V}+\mathrm{V}_{\mathrm{g}}}{\mathrm{V}}\right)$$

$$\mathrm{G}\left(\frac{\mathrm{V}-\mathrm{V}_{\mathrm{g}}}{\mathrm{V}}\right)$$

$$\mathrm{GV}_{\mathrm{g}}$$

MHT CET 2023 10th May Morning Shift

MCQ (Single Correct Answer)

-0

If only $$1 \%$$ of total current is passed through a galvanometer of resistance '$$G$$' then the resistance of the shunt is

$$\frac{G}{25} \Omega$$

$$\frac{\mathrm{G}}{49} \Omega$$

$$\frac{\mathrm{G}}{2} \Omega$$

$$\frac{\mathrm{G}}{99} \Omega$$

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