Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
If two conducting spheres are separately charged and then brought in contact
The total energy of the two spheres is conserved.
The total charge on the two spheres is conserved
Both the total energy and the total charge are conserved
The final potential is always the mean of the original potential of the two spheres
Two pieces of metallic wire having equal lengths and equal volume placed in air have different resistances. The two wires must
have different cross-sections
have different temperatures
be of different materials
be of same density
A heater coil is cut into two equal parts and only one part is used in the heater. The heat generated now will be
Doubled
Four times
One fourth
Halved
The direction of magnetic field at a point due to an infinitely long wire carrying current is
parallel to the current
anti parallel to the current
along the perpendicular drawn from a point on the wire
perpendicular to the plane containing the conductor and the point
A hollow metal ball carrying an electric charge produces no electric field at points :
outside the sphere
on its surface
inside the sphere
at a distance more than twice
