+91-87964 74404
FlagBACK
Question icon
Grade 11Electrostatics

a pendulem bob of mass 30mg carrying a charge of 2*10^-8 is at rest in auniform horiontal electric field of 20000N/c.the tension in the thread of the pendulem is

Profile image of Prasanna Parthiban
9 Years agoGrade 11
Answers icon

1 Answer

Profile image of Vikas TU
9 Years ago
ere we have given that mass is 30mg 
What's more, the charge i.e. q = 2*10^-8 and E = 20000N/c 
Give T a chance to be the pressure and Ѳ be the edge with the vertical. 
Presently in balance 
Tsin Ѳ = qE and Tcos Ѳ=mg 
At that point tan Ѳ = qE/mg 
=(2*10^-8 x20000)/(30x 10^-6 x9.8) 
=(4x 10^-4)/(294x10^-6) 
= 0.0136 x10^2 
Ѳ = 53.7o 
What's more, we additionally realize that Tsin Ѳ = qE 
T = qE/sinѳ 
= (2*10^-8 x20000)/sin53.7 
=(4x10^-4)/0.806 
= 4.96 x 10^-4 N 

Other Related Questions on electrostatics

question mark
Electrostatics question based on earthing of spherical shell
electrostatics
1 Answer Available

Last Activity: 3 Years ago

question mark
an object has a charge of 2c and gains 10^19 electrons. the net chaarge on the object becomes??
electrostatics
1 Answer Available

Last Activity: 4 Years ago

question mark
A wire with a linear charge density lambda forms a quarter of a cjrclenof radius R and is placed asa shown in thefigure with its centre of curvature at the origin O the electric field at O will be
electrostatics
1 Answer Available

Last Activity: 4 Years ago

question mark
Find the value of q so that system remains in equilibrium.. figure attached below
electrostatics
1 Answer Available

Last Activity: 4 Years ago

question mark
Need to find the time taken for the dipole to come back to eqm
 
electrostatics
1 Answer Available

Last Activity: 4 Years ago