Physics-
General
Easy
Question
The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0
cm is
- 80 volts
- 8
volts
- 9 volts
- 9 ×
volts
volts
volts
The correct answer is: 8 volts
Related Questions to study
Physics-
A hollow conducting sphere is placed in an electric field produced by a point charge placed at P as shown in figure. Let 
be the potentials at points A,B and C respectively. Then
A hollow conducting sphere is placed in an electric field produced by a point charge placed at P as shown in figure. Let be the potentials at points A,B and C respectively. Then
Physics-General
Physics-
A drop of 
water carries 
charge. What electric field should be applied to balance its weight (assume 
A drop of water carries charge. What electric field should be applied to balance its weight (assume
Physics-General
Physics-
Three charges Q,(+q) and (+q) are placed at the vertices of an equilateral triangle of side l as shown in the figure. If the net electrostatic energy of the system is zero, then Q is equal to
Three charges Q,(+q) and (+q) are placed at the vertices of an equilateral triangle of side l as shown in the figure. If the net electrostatic energy of the system is zero, then Q is equal to
Physics-General
Physics-
Two small spherical balls each carrying a charge 
(10 micro-coulomb) are suspended by two insulating threads of equal lengths 1m each, from a point fixed in the ceiling. It is found that in equilibrium threads are separated by an angle 
between them, as shown in the figure. What is the tension in the threads (Given: 
)
Two small spherical balls each carrying a charge (10 micro-coulomb) are suspended by two insulating threads of equal lengths 1m each, from a point fixed in the ceiling. It is found that in equilibrium threads are separated by an angle between them, as shown in the figure. What is the tension in the threads (Given: )
Physics-General
Physics-
A charge (-q) and another charge (+Q) are kept at two points A and B respectively. Keeping the charge (+Q) fixed at B, the charge (-q) at A is moved to another point C such that ABC forms an equilateral triangle of side l. The net work done in moving the charge (-q) is
A charge (-q) and another charge (+Q) are kept at two points A and B respectively. Keeping the charge (+Q) fixed at B, the charge (-q) at A is moved to another point C such that ABC forms an equilateral triangle of side l. The net work done in moving the charge (-q) is
Physics-General
Physics-
In the rectangle, shown below, the two corners have charges 
and 
. The work done in moving a charge 
from B to A is (take 
)
In the rectangle, shown below, the two corners have charges and . The work done in moving a charge from B to A is (take )
Physics-General
Physics-
Figures below show regular hexagons, with charges at the vertices. In which of the following cases the electric field at the centre is not zero
Figures below show regular hexagons, with charges at the vertices. In which of the following cases the electric field at the centre is not zero
Physics-General
Physics-
In the given figure distance of the point from A where the electric field is zero is
In the given figure distance of the point from A where the electric field is zero is
Physics-General
Physics-
Three charges Q,+q and +q are placed at the vertices of a right-angled isosceles triangle as shown. The net electrostatic energy of the configuration is zero if Q is equal to
Three charges Q,+q and +q are placed at the vertices of a right-angled isosceles triangle as shown. The net electrostatic energy of the configuration is zero if Q is equal to
Physics-General
Physics-
A charged particle of mass 
is held stationary in space by placing it in an electric field of strength 
directed vertically downwards. The charge on the particle is
A charged particle of mass is held stationary in space by placing it in an electric field of strength directed vertically downwards. The charge on the particle is
Physics-General
Physics-
As shown in the figure, charges +q and -q are placed at the vertices B and C of an isosceles triangle. The potential at the vertex A is
As shown in the figure, charges +q and -q are placed at the vertices B and C of an isosceles triangle. The potential at the vertex A is
Physics-General
Physics-
Three identical point charges, as shown are placed at the vertices of an isosceles right angled triangle. Which of the numbered vectors coincides in direction with the electric field at the mid-point M of the hypotenuse
Three identical point charges, as shown are placed at the vertices of an isosceles right angled triangle. Which of the numbered vectors coincides in direction with the electric field at the mid-point M of the hypotenuse
Physics-General
Physics-
Electric field strength due to a point charge of 
at a distance of 80 cm from the charge is
Electric field strength due to a point charge of at a distance of 80 cm from the charge is
Physics-General
Physics-
What is the potential energy of the equal positive point charges of 
each held 1 m apart in air
What is the potential energy of the equal positive point charges of each held 1 m apart in air
Physics-General
Physics-
Four charges are placed on corners of a square as shown in figure having side of 
. If Q is one microcoulomb, then electric field intensity at centre will be
Four charges are placed on corners of a square as shown in figure having side of . If Q is one microcoulomb, then electric field intensity at centre will be
Physics-General
