1
AP EAPCET 2022 - 4th July Morning Shift
+1
-0

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

A
$$\pi \beta\left[\frac{R^4}{12}+\frac{r_0^2 R^2}{6}+\frac{2 r_0 R^3}{9}\right]$$
B
$$\pi \beta\left[\frac{R^4}{6}+\frac{r_0^2 R^2}{12}+\frac{r_0 R^3}{9}\right]$$
C
$$\pi \beta\left[\frac{R^4}{12}+\frac{r_0^2 R^2}{12}+\frac{r_0 R^3}{9}\right]$$
D
$$\pi \beta\left[\frac{R^4}{8}+\frac{r_0^2 R^2}{6}+\frac{r_0 R^3}{12}\right]$$
2
AP EAPCET 2022 - 4th July Morning Shift
+1
-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

A
$$2 \Omega$$
B
$$3 \Omega$$
C
$$4 \Omega$$
D
$$5 \Omega$$
3
AP EAPCET 2021 - 20th August Morning Shift
+1
-0

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

A
1A from Q to P
B
1A from P to Q
C
3A from P to Q
D
2A to Q to P
4
AP EAPCET 2021 - 19th August Evening Shift
+1
-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

A
increase resistance in the main circuit
B
decrease resistance in the main circuit
C
increase resistance in series with the cell whose emf is to be measured
D
decrease resistance in series with the cell whose emf is to be measured
EXAM MAP
Medical
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