The radius of hydrogen atom is 5*10-11 m and the charge on electron or proton is of magnitude 1.6*10-11 c. At ground state,the dipole moment of the atom is
8*10-30cm
16*10-30cm
0 cm
4*10-30cm
An electron moves along x direction with a uniform speed.An electric field is applied along the Z direction.The path of the electron will be
A parabola is x-7 plane
A circle is x-7 plane
A parabola is x-Z plane
A straightline along Z axis
A charge q1 exert some force on another charge q2.If a third charge q3 is brought near q1 the force exerted by q1,on q2
decreases
remains unchanged
increases
cannot be said from the deta.
Two conducting spheres of radii 5cm and 3cm are charged to the same potential. The ratio of their charges will be
3:5
5:3
9:25
25:9
The electric potential v as a function of distance x is metres is given by V= (5x2-10x-9) volt. The value of electric filed at x= 1m would be
20 v/m
6 v/m
zero
11 v/m
There is an electric field E along x direction.If the work done is moving a charge 0.2c through a distance 2m along a line making an angle 60owith the x axis is 4.The value of E is
4N/C
8N/C
16N/C
20N/C
Inside a hollow charged spherical conductor the potential
Is constant
Varies directly ad the distance from the centre
varies inversely as the distance from the centre
varies inversely as the square of the distance from the centre.
A charged particle of mass 8 gm remains stationary on a vertical electric field.104KN/c.The amount of charge is
7.8×10-9 c
8×10-10c
8×1019c
8×10-19c
Two charged bodies carrying +Q and -Q charges are attached one at each end to a spring of released length L and spring constant K.If the subsequent length of the spring is L then the condition for equilibrium is
Q2=4πεok(L'-L)L2
Q2=4πεok(L'-L)L
Q2=4πεok(L'-L)L'2
Q2=4πεok(L-L')L'2
A capacitor is connected to a battery. If a dielectric slab is introduced fully in the intervening space between the capacitor plates the electric field between the plates will
Decrease
Increase
Remain the same
cannot be answered from the data
