Question

joules generated per minute.
Calculate the heat energy in
Which kind of mirror is used in the headlights of a car? Why is it used for this
purpose?
e. A concave mirror has a focal length of 4cm and an object 2cm tall is placed 9cm
away from it. Find the nature, position and size of the image formed.
3. Each question contains 4 marks each.
a. What do you understand by the power of a lens? Name one factor on which the
power of a lens depends. What is the unit of power of a lens? Define the unit of
power of a lens.
b. A bulb is rated at 2001 - 100W. What is its resistance? Five such bulbs burn for
4 hours? What is the electrical energy consumed? Calculate the cost if the rate is
Rs. 4.60 per unit
c. What is the advantage of using a convex mirror as a rear view mirror in vehicles
as compared to a plane mirror? Illustrate your answer with the help of labelled
diagrams.
[27 MARKS]
TION - B (CHEMISTRY)
1. Multiple Choice Questions. Each question contains
Which of the following metals fails to evo
a.​

Answer 1

Answer:

bhai aapka to poshan itna bada Kaun Aaj kar dega uska paise answer aap hi bata do to kya ho jaega aur kya hal chaal hai

Answer 2

Answer:

hope it's help full for u