Chapter 17 – Electric Charge and Field
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 17 - Electric Charge and Field
A charged oil drop is suspended in a uniform field of 3×10^4V/m so that it neither falls nor rises. The charge on the drop will be (take the mass of the drop is =9.9×10^−15kg and g=10m/s^2)
30
Nov
A charged oil drop is suspended in a uniform field of 3×10^4V/m so that it neither falls nor rises. The charge on the drop will be (take the mass of the drop is =9.9×10^−15kg and g=10m/s^2) A charged oil drop is suspended in a uniform field of 3×10^4V/m so that it neither falls nor rises. [...]
An electron of mass me, initially at rest, moves through a certain distance in a uniform electric field in time t1 A proton of mass mp, also, initially at rest, takes time t2 to move through an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio t2/t1 l is nearly equal to
30
Nov
An electron of mass me, initially at rest, moves through a certain distance in a uniform electric field in time t1 A proton of mass mp, also, initially at rest, takes time t2 to move through an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio t2/t1 l is nearly [...]
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An electron of mass me ,
initially at rest ,
moves through a certain distance in a uniform electric field in time t1 A proton of mass mp ,
takes time t2 to move through an equal distance in this uniform electric field. Neglecting the effect of gravity ,
the ratio t2/t1 l is nearly equal to ,
Two point +ve charges q each are placed at (−a,0) and (a,0) . A third +ve charge q0 is placed at (0,y) . Find the value of y for which the force at q0 is maximum.
30
Nov
Two point +ve charges q each are placed at (−a,0) and (a,0) . A third +ve charge q0 is placed at (0,y) . Find the value of y for which the force at q0 is maximum. 0 ) and ( + a 0) . A third +ve charge q0 is placed at (0 Two point [...]
Two equally charged identical metal spheres A and B repel each other with a force of 3×10^−5 N. Another identical uncharged sphere C is touched with A and then placed at the midpoint between A and B. Net force on C is.
30
Nov
Two equally charged identical metal spheres A and B repel each other with a force of 3×10^−5 N. Another identical uncharged sphere C is touched with A and then placed at the midpoint between A and B. Net force on C is. Force between two identical charges placed at a distance of r in vacuum [...]
Two identical charged spheres suspended from a common point by two mass-less strings of length l are initially at a distance d ( d much less than l) apart because of their mutual repulsion . Determine the angle formed between the two strings at equilibrium position.
30
Nov
Two identical charged spheres suspended from a common point by two mass-less strings of length l are initially at a distance d ( d much less than l) apart because of their mutual repulsion . Determine the angle formed between the two strings at equilibrium position. Force between two identical charges placed at a distance [...]
Under the action of a given coulombic force the acceleration of an electron is 2.5×10^22ms^−2. Then the magnitude of the acceleration of a proton under the action of same force is nearly
30
Nov
Under the action of a given coulombic force the acceleration of an electron is 2.5×10^22ms^−2. Then the magnitude of the acceleration of a proton under the action of same force is nearly Under the action of a given coulombic force the acceleration of an electron is 2.5×10^22ms^−2. Then the magnitude of the acceleration of a [...]
Force between two identical charges placed at a distance of r in vacuum is F. Now a slab of dielectric constant K = 4 is inserted between these two charges . If the thickness of the slab is r/2, then the force between the charges will becomes
30
Nov
Force between two identical charges placed at a distance of r in vacuum is F. Now a slab of dielectric constant K = 4 is inserted between these two charges . If the thickness of the slab is r/2, then the force between the charges will becomes Force between two identical charges placed at a [...]