Home
Class 12
PHYSICS
A conducting sphere of radius 10 cm has ...

A conducting sphere of radius 10 cm has an unknown charges. If the electric field 20 cm from the centre of the sphere is `1.5 xx10^(3) N//C ` and points radially inward, What is the net charges on the sphere?

Text Solution

Verified by Experts

Here radius of sphere ` R= 10 cm =0.1 m, `distance of point from the centre of sphere `r=20 cm -0.2 m and `electric field E = ` 1.5 xx 10^(3) N//C `
As `r lt R , `hence E = `(q)/(4pi in _0 r^(2))`
`rArr " " q= E. 4pi in _0r^(2) =(1.5 xx10^(3) xx(0.2)^(2))/(9xx10^(9)) =6.67 xx10^(-9) C or 6.67 nC `
As electric field points radially inward, it means that the charges is negative.
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CHARGES AND FIELDS

    U-LIKE SERIES|Exercise ADDITIONAL EXERCISES|10 Videos

  • ELECTRIC CHARGES AND FIELDS

    U-LIKE SERIES|Exercise CASE BASED/ SOURCE -BASED INTEGRATED QUESTIONS|14 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST SECTION-C (VERY SHORT ANSWER QUESTIONS)|3 Videos

  • ELECTROMAGNETIC WAVES

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION C)|1 Videos

Similar Questions

Explore conceptually related problems

A conducting sphere fo radius 10 cm has an unknown charge. If the electric field 20 cm from the center of the sphere is 1.5xx10^(3) N//C and points radilly inwards, what is the net charge on the sphere ?

A conducting sphere of radius 5 cm has an unknown charge. The electric field at 10 cm from the centre of the sphere is 1.8xx10^(3)NC^(-1) and points radially inward. What is the net charge on the sphere?

A conducting sphere of radius 10 cm has unknown charge. If the electric field at a distance 20 cm from the centre of the sphere is 1.2xx10^(3)NC^(-1) and points radially inwards. The net charge on the sphere is

What is the net charge on a conducting sphere of radius 10 cm ? Given that the electric field 15 cm from the center of the sphere is equal to 3xx10^(3) N/C and is directed inward

A hollow sphere of radius 1m is given a positive charge of 10µC. The electric field at the centre of hollow sphere will be :

A conducting sphere of radius R is given a charge Q . The electric potential and the electric field at the centre of the sphere respectively are

A hollow insulated conducting sphere of radius 2m, is given a charge of 5 muC . What will be the electric field at the centre of the sphere?

A Charge of 4 xx 10^(-8) C is distrivuted uniformaly on the surface of a sphere of rasius 1 cm. It is covered by a concentric, hollow conducting sphere of radius 5 cm. (a) Find the electric field at a point 2 cm away from the centre. (b) A xharge of 6 xx 10^(-8)C is placed on the hollow spher. Find the surface charge density on the auter surface of the hollow sphere.

A conducting sphere of radius R=20 cm is given a charge Q=16muC . What it vecE at centre