The hypermetropia is a (a) short-sight defect (b) long-sight defect (c) bad vision due to old age (d) none of these Ans: (b) Solution: A person suffering from hyper metropia can see objects beyond a particular point called the near point. If the object lies at a point nearer than this point, then image is not formed at the retina. This is also known as long-sight defect.

 The hypermetropia is a

 

 
(a) short-sight defect
(b) long-sight defect
(c) bad vision due to old age
(d) none of these

 

 
Ans: (b)
Solution: A person suffering from hyper metropia can
see objects beyond a particular point called the near
point. If the object lies at a point nearer than this point,
then image is not formed at the retina. This is also known
as long-sight defect.

 

 

A uniform electric field and uniform magnetic field
are acting along the same direction in a certain region. If
an electron is projected in the region such that its velocity
is pointed along the direction of fields, then the electron
(a) will turn towards right of direction of motion
(b) speed will decrease
(c) speed will increase
(d) will turn towards left direction of motion

 

Ans: (b)
Solution: ⃗V and B⃗ are in same direction so that magnetic
force on electron becomes zero, only electric force acts.
But force on electron due to electric field is opposite to
the direction of velocity