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WorksheetsPhysics ch 1. Electric charges and Fields
Total questions: 10
Worksheet time: 14mins
1. When a glass rod is rubbed with silk, it
(a) gains electrons from silk.
(b) gives electrons to silk.
(c) gains protons from silk.
(d) gives protons to silk.
(a) gains electrons from silk.
(b) gives electrons to silk.
(c) gains protons from silk.
(d) gives protons to silk.
Two similar spheres having +Q and -Q charges are kept at a certain distance. F force acts between the two. If at the middle of two spheres, another similar sphere having +Q charge is kept, then it experiences a force in magnitude and direction as
(a) zero having no direction.
(b) 8F towards +Q charge.
(c) 8F towards -Q charge.
(d) 4F towards +Q
(a) zero having no direction.
b) 8F towards +Q charge.
(c) 8F towards -Q charge.
(d) 4F towards +Q
A charge q is placed at the centre of the line joining the two equal charges Q. The system of three charges will be in equilibrium , if q is equal to
-Q/2
-Q/4
+Q/4
+Q/2
ABC is an equilateral triangle charges of + q are placed at each corner. The electric field at O will be
0
Two infinitely long parallel thin sheets having surface charge density Sigma and minus Sigma respectively are separated by a small distance.The medium between the sheets is vacuum The electric field in the region between the sheets is
Zero
The electric charges are distributed in a small volume. The flux of the electric field through a surface of radius 10cm surrounding the total charge is 20 Vm.The flux over a concentric sphere of radius 20cm will be
20 Vm
25 Vm
40 Vm
200 Vm
When air is replaced by a dielectric medium of dielectric constant K ,the force of attraction between two charges Q1 and Q2 separated by a finite distance d
decreases K times
Increases K times
Remains unchanged
Decreases K^2 Times
10 electric dipoles each of the dipole moment P are enclosed within a closed surface. Total electric flux linked with the surface is
10 Vm
Zero
20 Vm
5 Vm
An electric dipole is placed at an angle of 30 degree to a non uniform electric field the dipole will experience
A translational force only in the direction of the field
A translation force only in a direction normal to the direction of the field
A torque as well as a translational force
A torque only
When 10 ^14 electrons are removed from a neutral metal sphere ,the charge on the sphere becomes
16 micro coulomb
-16 micro coulomb
32 micro coulomb
-32 micro coulomb
