# TNPSC Group4 Q&A 2014, 2016   Physics

If power of a lens is -0.5 dioptre focal length and type of lens is

 2 m, concave 2 m, convex 50 cm, concave 50 cm, convex

Find the odd one out :
Related with heat in one action.

Doordarshan provides free-to-air DTH service as
I. Ku - band
II. DD direct +
III. S band
IV. K band

 I only I and II only III only I and IV only

Match the following :
(a) Force 1. Watt
(b) Momentum 2. Joule
(c) Power 3. Kg.$ms^{-1}$
(d) Energy 4. Newton
(а) (b) (c)(d)

 4 1 2 3 3 2 1 4 3 1 2 4 4 3 1 2

Choose the correct one :
If kerosene, water and mercury is taken in a same glass tumbler, arrange the position of
them from the top to the bottom of the glass tumbler.

 Mercury, Kerosene, Water Kerosene, Water, Mercury Water, Mercury, Kerosene Kerosene, Mercury, Water

How many electrons are there in one coulomb charge?

 1.6 x $10^{-19}$ electrons 6.25 x $10^{18}$ electrons 6.25 x $10^{-18}$ electrons 1.6 x $10^{19}$ electrons

A bullet of mass 15 g is horizontally fired with velocity 100 $ms^{-1}$ from a pistol of mass 2 kg.
Total momentum of the pistol and bullet before firing is equal to

 zero 201,5 kg $ms^{-1}$ 215 kg $ms^{-1}$ 200 kg $ms^{-1}$

If you stand in a rectangular room, where two adjacent walls are covered with plane
mirrors, the total number of your images will be

 infinity 1 3 0

Audible range of rabbit is

 100 - 32,000 Hz 1000–1,50,000 Hz 1,000 - 1,00,000 Hz 900 - 2,00,000 Hz

Name the Battery that shuts down on over heating and restarts when the temperature
becomes cool

 Sodium ion Lithium ion Carbon ion Potassium ion