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
In an incandescent electric bulb, the filament of the bulb is made up of which metal?
Aluminium
Copper
Tungsten
Silver
Light of uniform intensity impinges perpendicularly on a totally reflecting surface. If the area of the surface is halved, the radiation force on it will become
double
half
four times
One fourth
Consider the following image:
A proton enters a magnetic field at right angles to it, as shown above. The direction of force acting on the proton will be
to the right
to the left
out of the page
into the page
When the short circuit condition occurs, the current in the Circuit ?
becomes zero
remains constant
increases substantially
keeps on changing randomly
In the case of a concave mirror, if an object is kept between principal focus F and pole P of the mirror, then which one of the following statements about the image is correct?
The image will be virtual erect and magnified
The image will be enlarged or magnified
The image will be formed at infinity
The image will be real
