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WorksheetsNUMS T6 Electrostatic
Total questions: 25
Worksheet time: 21mins
Coloumb force is
Mutual force
Short range force
Centripetal force
All of these
The minimum change on an object can't be less then
1.6x 10-19C
9.1x109C
100000c
No defined value
The number of electrons in one coulomb charge is equal to
6.02 x 1018
1.6 x 1019
1.6 x 10-19
6.23 x 10 21
Units of permittivity of free space is
F/m
C2 /Nm
Nm2 /C 2
None
Electric field lines
Never cross each other
Depends on charge shape
Can cross each other
Not enough information
Photocopier and ink jet printer are application of
Electrostatics
Magnetism
Thermal physics
None
If the distance between two point charges to become double then the coulomb force will be
F/2
2F
4F
F/4
Charge is distributed uniformally on the surface of spherical baloon(an insulator).A point particle with Charge q is inside .The electric force on particle is greatest when:
It is at center of baloon
It is anywhere inside (force is zero everywhere)
Halfway between baloon
None
Which diagram represents electric fields of negative point charge,shown
Which diagram represents the electric field in the vicinity of a positive electric charge of magnitude Q.
Neutral zone in electric field of two similar charge is region where
Both positive an negative change present
Equal amount of both positive and negative charge present
Electric dipole exist
No electri field lines passes
When one electron is taken towards other electron then electric potential energy of system
Decrease
Same
Zero
Increase
In electric polarization, induced and external field are
Parallel
Antiparallel
Perpendicular
None
If 2 ohm resistance is connected to a capacitor of 1 micro farad, then time constant is ____micro farad.
1
2
3
1/2
Which is principal of capacitor
Charging by polarization
Charging by electrostatic induction
Charging by conduction
Charging by radiation
A surface enclosed an electric dipole.The electric flux through this surface is
Positive
Zero
Negative
None
Choose incorrect option for electric field lines
If plates of charged capacitor are still attached with battery and dielectric is inserted then
Capacitance increase
Charge increase
Both
None
An alpha particle is accelerated through p.D of 103 volts .It's K.E is
1kev
2kev
3kev
4kev
A surface encloses an electric dipole. The electric flux through that surface is
Positive
Negative
Zero
All
The electric field at s distance of 10 cm from an isolated point particle with a charge of 2 x 10-9 C is ______N/C
1.8
180
1800
1800000
The electric Intensity is expressed in units of N/C or
Volts
Joules
Walt
V/m
In RC series circuit, for the rapid charging of a capacitor of constant capaticance, resistance attached should be
Large
Small
Either large or small
Both can be
If the charge on plates of a capacitor is 4C and the energy stored in it is 4J then what will be value of capacitance
2F
4F
9F
5F
The force between 2 similar unit charge placed one meter apart in air in Newton is
zero
One
9x 10 11
9 x 10 9
