CTET Solved Paper - UTET April 2015 Paper2
126. Rocket works on the principle of conservation of
- Option : C
- Explanation : (C) A rocket works by expelling gases from one end at a very high speed which inturn, upthrust the rocket. This illustrates law of conservation of momentum.
127. Wisdom teeth normally grow during the age of
- Option : B
- Explanation : (B) Wisdom tooth normally grow during the age of 17-30 years. It does not have any functunal value
128. Life of RBC in human blood is
- Option : C
- Explanation : (C) The Red blood cells (RBC) develops in the bone marrow and circulate for about 100 to 120 days in the body. After they death components are recycled is liver
130. The heating element in an electric iron is made of
- Option : C
- Explanation : (C) Nichrome has relatively high resistance. So, it is used as heating element in an electric iron.
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