Human Eye and Colourful World — Science STD 10 — Question

Magnification produced by a convex mirror is always:

1. More than 1.
2. Less than 1.
3. Equal to 1.
4. More or less than 1.

A real image of an object is to be obtained. The mirror required for this purpose is:

If there had been one eye of the man, then:

In an electrical circuit two resistors of 2Ω and 4Ω respectively are connected in series to a 6V battery. The heat dissipated by the 4Ω resistor in 5s will be:

After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles:
Left eye: +2.00D
Right eye: +2.25D
The child is suffering from the defect of vision called:

Our eye lens is held in position by:

Choose the incorrect statement.

Electricians wear rubber gloves because:

A convex lens produces a magnification of +5. The object is placed:

The power of a concave lens is 10D and that of a convex lens is 6D. When these two lenses are placed in contact with each other, the power of their combination will be: