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
A lens has a power of +2.0 Dioptre. Which one of the following statements about the lens is true?
The lens is concave and has a focal length of 0.5 meter
The lens is convex and has a focal length of 20 meter
The lens is convex and has a focal length of 0.5 meter
The lens is concave and has a focal length of 20 meter
Light enters the eye through a thin membrane called
retina
cornea
pupil
iris
A lemon kept in water in a glass tumbler appears to be larger than its actual size. It is because of
reflection of light
scattering of light
refraction of light
polarization of light
Which one of the following elements isotope is used in the treatment of cancer?
Uranium
cobalt
Sodium
iodine
Which one of the following statements regarding the magnetic field is NOT correct?
The magnetic field is a quantity that has direction and magnitude
Magnetic field lines are closed curves
Magnetic field lines are open curves
No two magnetic field lines are found to cross each other
