AP EAPCET 2022 - 4th July Morning Shift | Current Electricity Question 28 | Physics

Current density in a cylindrical wire of radius $$R$$ varies with radial distance as $$\beta\left(r+r_0\right)^2$$. The current through the section of the wire shown in the figure is

AP EAPCET 2022 - 4th July Morning Shift Physics - Current Electricity Question 28 English

$$\pi \beta\left[\frac{R^4}{12}+\frac{r_0^2 R^2}{6}+\frac{2 r_0 R^3}{9}\right]$$

$$\pi \beta\left[\frac{R^4}{6}+\frac{r_0^2 R^2}{12}+\frac{r_0 R^3}{9}\right]$$

$$\pi \beta\left[\frac{R^4}{12}+\frac{r_0^2 R^2}{12}+\frac{r_0 R^3}{9}\right]$$

$$\pi \beta\left[\frac{R^4}{8}+\frac{r_0^2 R^2}{6}+\frac{r_0 R^3}{12}\right]$$

AP EAPCET 2022 - 4th July Morning Shift

MCQ (Single Correct Answer)

-0

A cell can supply currents of 1 A and 0.5 A via resistances of $$2.5 \Omega$$ and $$10 \Omega$$, respectively. The internal resistance of the cell is

$$2 \Omega$$

$$3 \Omega$$

$$4 \Omega$$

$$5 \Omega$$

AP EAPCET 2021 - 20th August Morning Shift

MCQ (Single Correct Answer)

-0

Five current carrying conductors meet at a point P. What is the magnitude and direction of the current in the fifth conductor?

AP EAPCET 2021 - 20th August Morning Shift Physics - Current Electricity Question 30 English

1A from Q to P

1A from P to Q

3A from P to Q

2A to Q to P

AP EAPCET 2021 - 19th August Evening Shift

MCQ (Single Correct Answer)

-0

In a potentiometer of 10 wires, the balance point is obtained on the 6th wire. To shift the balance point to 8th wire, we should

increase resistance in the main circuit

decrease resistance in the main circuit

increase resistance in series with the cell whose emf is to be measured

decrease resistance in series with the cell whose emf is to be measured

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