The work required to put the four charges at the corners of a square of side a, as shown in figure, is
None of these
None of these
Answer:The correct answer is:
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Two parallel conducting plates, each of area A, are separated by a distance. Now, the left plate is given a positive charge Q. A positive charge q of mass m is released from a point near the left plate. Find the time taken by the charge to reach the right plate
Two parallel conducting plates, each of area A, are separated by a distance. Now, the left plate is given a positive charge Q. A positive charge q of mass m is released from a point near the left plate. Find the time taken by the charge to reach the right plate
Charges +q and –q are placed at points A and B respectively which are a distance 2L apart, C is the mid-point between A and B. The work done in moving a charge + Q along the semicircle CRD is
Charges +q and –q are placed at points A and B respectively which are a distance 2L apart, C is the mid-point between A and B. The work done in moving a charge + Q along the semicircle CRD is
Which one of the following species possesses maximum size
has lowest charge among them. So it is largest in size.Which one of the following species possesses maximum size
has lowest charge among them. So it is largest in size.The ionic radii of 
, , 
and 
follow the order
is maximum. It has smallest size.The ionic radii of , , and follow the order
is maximum. It has smallest size.On moving down a group of regular elements, both atomic and ionic radii increases with increasing
On moving down a group of regular elements, both atomic and ionic radii increases with increasing
Which one of the following indicates the correct order of atomic size
. Atomic size decreases across a periodWhich one of the following indicates the correct order of atomic size
. Atomic size decreases across a periodWhich has the smallest size
. Therefore its size is smallestWhich has the smallest size
. Therefore its size is smallestA sodium cation has a different number of electrons from
electron ; 
4 electroA sodium cation has a different number of electrons from
electron ; 4 electroWhich of the following attacks glass
The etching of glass is based on these reactions.
Which of the following attacks glass
The etching of glass is based on these reactions.
The lanthanide contraction is responsible for the fact that
The lanthanide contraction is responsible for the fact that
The unit representing atomic radii and ionic radii is
The unit representing atomic radii and ionic radii is
The atomic radii in periodic table among elements from right to left
The atomic radii in periodic table among elements from right to left
The maximum field intensity on the axis of a uniformly charged ring of charge q and radius R will be
The maximum field intensity on the axis of a uniformly charged ring of charge q and radius R will be
A 10 μF capacitor and a 20μ F capacitor are connected in series across 200 V supply line. The charged capacitors are then disconnected from the line and reconnected with their positive plates together and negative plates together and no external voltage is applied. What is the potential difference across each capacitor?
A 10 μF capacitor and a 20μ F capacitor are connected in series across 200 V supply line. The charged capacitors are then disconnected from the line and reconnected with their positive plates together and negative plates together and no external voltage is applied. What is the potential difference across each capacitor?
An electron enters the space between the plates of a charged capacitor as shown. The charge density on the plate is σ Electric intensity in the space between the plates is E .A uniform magnetic field also exists in the space perpendicular to the direction of E The electron moves perpendicular to both E and B without any change in direction. The time taken by the electron to travel a distance I in the space is
An electron enters the space between the plates of a charged capacitor as shown. The charge density on the plate is σ Electric intensity in the space between the plates is E .A uniform magnetic field also exists in the space perpendicular to the direction of E The electron moves perpendicular to both E and B without any change in direction. The time taken by the electron to travel a distance I in the space is