Question:- (a) Consider an arbitrary electrostatic field configuration. A small test charge is placed at a null point (i.e., where E...Read More
Consider an arbitrary electrostatic field configuration. A small test charge is placed at a null point (i.e., where E = 0) of the configuration. Show that the equilibrium of the test charge is necessarily unstable.(b) Verify this result for the simple configuration of two charges of the same magnitude and sign placed a certain distance apart. | question and answer !
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November 07, 2018
Rating: 5
Question:-- (a) Two insulated charged copper spheres A and B have their centers separated by a distance of 50 cm. What is the mutual...Read More
Two insulated charged copper spheres A and B have their centers separated by a distance of 50 cm. What is the mutual force of electrostatic repulsion if the charge on each is 6.5 x 10 power-7 C ? The radii of A and B are negligible compared to the distance of separation. (b) What is the force of repulsion if each sphere is charged double the above amount, and the distance between them is halved? | question and answer !
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on
November 06, 2018
Rating: 5
Question:- A polythene piece rubbed with wool is found to have a negative charge of 3 x 10 power-7 C. (a) Estimate the number of e...Read More
A polythene piece rubbed with wool is found to have a negative charge of 3 x 10 power-7 C. (a) Estimate the number of electrons transferred (from which to which) (b) Is there a transfer of mass from wool to polythene? | question and answer !
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November 06, 2018
Rating: 5
Question :- An electric dipole with dipole moment 4 x 10 power -9 Cm is aligned at 30 degree with the direction of a uniform electri...Read More
An electric dipole with dipole moment 4 x 10 power -9 Cm is aligned at 30 degree with the direction of a uniform electric field of magnitude 5 x 10 power 4 NC inverse -1. Calculate the magnitude of the torque acting on the dipole. | question and answer !
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on
November 04, 2018
Rating: 5
Question :- A system has two charges qA = 2.5 10 power -7 C and qB = 2.5 10 power -7C located at points A: 0,0, -15cm and B: 0,0, +1...Read More
A system has two charges qA = 2.5 10 power -7 C and qB = 2.5 10 power -7C located at points A: 0,0, -15cm and B: 0,0, +15cm, respectively. What are the total charge and electric dipole moment of the system? | question and answer !
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on
November 04, 2018
Rating: 5
Question :- shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which pa...Read More
shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio? | question and answer !
Reviewed by micheal
on
November 03, 2018
Rating: 5
Question :- What is the net flux of the uniform electric field of Exercise15 through a cube of side 20 cm oriented so that its fac...Read More
What is the net flux of the uniform electric field of Exercise15 through a cube of side 20 cm oriented so that its faces are parallel to the coordinate planes? | question and answer !
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on
November 03, 2018
Rating: 5
Question :- Two point charges qA = 3μC and qB = -3μC are located 20 cm apart in vacuum. (a) What is the electric field at the mid...Read More
Two point charges qA = 3μC and qB = -3μC are located 20 cm apart in vacuum. (a) What is the electric field at the midpoint O of the line AB joining the two charges? (b) If a negative test charge of magnitude 1.5 10 power -9 C is placed at this point, what is the force experienced by the test charge? | question and answer !
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on
November 03, 2018
Rating: 5
Question :- (a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not? (b) ...Read More
(a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not? (b) Explain why two field lines never cross each other at any point? | question and answer !
Reviewed by micheal
on
November 01, 2018
Rating: 5
Question :- Four point charges q A = 2μC,qB = -5μC,qC = 2μC, and qD = -5μC are located at the corners of a square ABCD of side 10 ...Read More
Four point charges q A = 2μC,qB = -5μC,qC = 2μC, and qD = -5μC are located at the corners of a square ABCD of side 10 cm. What is the force on a charge of 1μC placed at the center of the square ? | question and answer !
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on
November 01, 2018
Rating: 5
Question :- When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observed with many other ...Read More
When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observed with many other pairs of bodies. Explain how this observation is consistent with the law of conservation of charge. | question and answer !
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on
November 01, 2018
Rating: 5
Question :- (a) Explain the meaning of the statements ‘electric charge of a body is quantized’. (b) Why can one ignore quantizati...Read More
(a) Explain the meaning of the statements ‘electric charge of a body is quantized’. (b) Why can one ignore quantization of electric charge when dealing with macroscopic i.e., large scale charges? | question and answer !
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on
November 01, 2018
Rating: 5
Question :- Check that the ratio ke2 / G me mp is dimensionless. Look up a Table of Physical Constants and determine the value of t...Read More
Check that the ratio ke2 / G me mp is dimensionless. Look up a Table of Physical Constants and determine the value of this ratio. What does the ratio signify? | question and answer !
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on
November 01, 2018
Rating: 5
Question :- The electrostatic force on a small sphere of charge 0.4μC due to another small sphere of charge 0.8μC in air is 0.2 N....Read More
The electrostatic force on a small sphere of charge 0.4μC due to another small sphere of charge 0.8μC in air is 0.2 N. (a) What is the distance between the two spheres? (b) What is the force on the second sphere due to the first? | question and answer !
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on
November 01, 2018
Rating: 5
question : - Answer :- Repulsive force of magnitude Charge of the first sphere Charge of the second sphere Distance...Read More
What is the force between two small charged spheres having charges of 2 x 10-7 C and 3 x 10-7 C placed 30 cm apart in air?
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on
November 01, 2018
Rating: 5
