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It consists of three cases followed by questions. There are a total of 12 questions (Q. No. 49 to 60 ) in this section. Attempt any 10 questions from this section. The first attempted 10 questions would be evaluated. P-Did not react eiter with cold or hot water but reacted with steam
Q- Reacted with hot water and the metal started floating
R - Reacted violently with cold water
S- Did not react with water at all
Based on the above observation answer the following:
Case-I:
A student, took four metalsP , Q , R , and S and carried out different experiments to study the properties of metals. Some of the observation were:
- All metal could not be cut with knife except metal R.
- Metal P combined with oxygen to form an oxideM 2 O 3 which reacted with both acids and bases.
- Reaction with water.
Q- Reacted with hot water and the metal started floating
R - Reacted violently with cold water
S- Did not react with water at all
Based on the above observation answer the following:
Case-I:
A student, took four metals
- All metal could not be cut with knife except metal R.
- Metal P combined with oxygen to form an oxide
- Reaction with water.
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Question : 58
Total: 60
What is the value and sign of magnification (according to the new Cartesian sign convention) of the image formed by L 1 ?
Solution:
Magnification can be defined as the ratio of size of the image to the size of the object. It is denoted by m . This magnification can tell us about the nature of the image based on the sign itself. If the ratio is negative then the image is real and inverted.
Image formed byL 1 is real, inverted and magnified. Thus, its magnification should be negative and more than 1 .
Image formed by
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