Which of the following is the area of the rectangle whose length is 4.2 cm and breadth is 1.3 cm?
Answers
Answer:
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Explanation:
of July if these appliances are used for 7 hrs daily. Take the cost of 1 unit of energy as
Rs. 2.50.
SECTION – B (Attempt all questions)
Q. 6. 1.
What are the laws of electrostatics?
(1)
2.
Why a man’s voice is more shrill than a woman’s voice?
(1)
3.
What are the factors affecting evaporation?
(1)
Q. 7. 1.
How will you find out the nature of charge on a body using a gold leaf
electroscope?
(1)
2.
What is meant by earthing of an appliance?
(1)
3.
Why do you pour hot water over the neck of a glass bottle to remove a stuck
stopper?
(1)
Q. 8. 1.
How does amplitude and loudness relate to each other?
(1)
2.
What precautions should you take to protect yourself from lightning?
(2)
3.
Why wet person will get severe shock when touched on an electrical appliance?
(1)
Answer:
length into breadth
Explanation:
5.46