WorksheetsElectrostatics and Electricity
Total questions: 9
Worksheet time: 17mins
What is the difference between electrostatics and electricity ?
in current electricity the charges are at rest and they are accumulating on the surface of the insulator. Whereas in electrostatic electricity the electrons are moving inside the conductor.
in static electricity the charges are at rest and they are accumulating on the surface of the insulator. Whereas in current electricity the electrons are moving inside the conductor.
Current electricity consists of flowing charges whereas static electricity consists of stationary charges and they are inside the conductor.
There is always a magnetic field associated with electrostatics, but there cannot be a magnetic field in current electricity.
Which of the following statements below is or are correct about Coulomb's law?
The force between two objects is inversely proportional to the square of the distance between two objects.
The attraction or repulsion forces within the spherical distribution of charge is stronger closer to the molecule and becomes weaker as the distance from the molecule increases.
This law also accounts for the forces that bind atoms together to form molecules and for the forces that bind atoms and molecules together to form solids and liquids.
Coulomb’s law quantifies the interaction between 2 or more stationary charges. It is proportional to both charges and inversely proportional to the distance between the charges
Electric potential is a ....................quantity but electric field is a ......................quantity.
(a)
1.Calculate the electric flux created by a charge of 400 nC, placed in a medium whore relative permittivity is 2.5.
18.1 x 10^3 Vm
8.1 x 10^3 Vm
18.1 x 10^3 V
10.6 x 10^3 V
A single electron is accelerated from rest in a constant electric field of 1000 N/C through a distance of 3 cm. Find the electric force on the electron, and calculate its final velocity (me = 9.1 x 10^-31 kg)
8.2 x 10^6 m/s
1000 m/s
3.2 x 10^6 m/s
7.6 x 10^6 m/s
1.What is the voltage 5.0 cm away from the center of 1.0 cm diameter solid sphere that has a static charge of -3.00 nC?
200 V
539 V
- 561 V
-539 V
How much work does the electric field do in moving a -7.7 μC charge from ground to a point whose potential is +65 V higher?
6.0 x 10^-4 J
-5.0 x 10^-4 J
5.0 x 10^-4 J
5.5 x 10^-4 J
1.A wire delivers 12.0 C of charge in 4.0 s. What is the current in the wire?
3 mA
4.0 mA
9.0 A
3.0 A
The EMF of a cell falls from 3 volts to 2.8 volts when it’s terminals are joined to an electrical load of 4 Ohms. Calculate the internal resistance of the cell.
0.285 kΩ
0.285 Ω
0.172 Ω
1.285 Ω
