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There is an error of `0.2%` in measurment of the redius of a sphere. Find the percentage error in its (i) volume, (ii) surface.

Monjur Alahi

There is an error of `0.2%` in measurment of the redius of a sphere. Find the percentage error in its
(i) volume, (ii) surface.


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Salim Ahmed Kawsar

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Correct Answer - `(i) 0.6% (ii) 0.4%`

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Electric charge +q is iniformaly distributed over the entire volume of a sphere of radius r. Calculate the magnetic moment of the sphere if it spins a

Correct Answer - `(1)/(5)qwr^(2),(q)/(2m)`

2 Answers 1 views
Charge of `12muC` is given toa hollow metallic sphere of radius 0.1 m. find the potential at (i) the surface of the sphere (ii) the centre of the sphe

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2 Answers 1 views
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Correct Answer - 36 kV, 3kV, 6kV

2 Answers 9 views
Consider three identical metal spheres ` A, B` and `C`. Sphere `A` carries charge ` + 6q`, sphere `B` carries charge `-3q` and sphere `C` carries no c

Correct Answer - `2.25q`

2 Answers 4 views
The redius of curvature of the convex face of a plano-convex lens is 12cm and its refractive index is 1.5. a. Find the focal length of this lens. The

Correct Answer - (a) `+24 cm`; (b) `- 36cm` (c) `12 cm`(d) `- 180 cm`

2 Answers 1 views
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Correct Answer - ` 4500 pi cm^(3)`

2 Answers 1 views
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Correct Answer - `(-4)/(675 pi) cm//sec`

2 Answers 1 views
The radius of a sphere decreases from 10 cm to `9.9` cm. Find (i) approximate decrease in its volume. (ii) approximate decrease in its surface.

Correct Answer - `(i) 40 pi cm^(3) (ii) 8 pi cm^(2)`

2 Answers 1 views
If there is an error of 0.1% in the measurement of the radius of a sphere, find approximately the percentage error in the calculation of the volume of

Correct Answer - 0.003

2 Answers 1 views
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Correct Answer - `269.5 cm^(3)`

2 Answers 1 views

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