Practice Questions CBSE - Science Class 10 (2023 Boards)

Question 1

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Question 3 Important

Question 4 Important

Question 5 Important

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Question 7 Important

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Question 9 Important

Question 10

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Question 12 Important

Question 13 Important

Question 14

Question 15 Important

Question 16 You are here

Question 17 [Assertion Reasoning] Important

Question 18 [Assertion Reasoning] Important

Question 19 [Assertion Reasoning] Important

Question 20 [Assertion Reasoning]

Question 21 (Choice 1) Important

Question 21 (Choice 2)

Question 22 Important

Question 23

Question 24 Important

Question 25 (Choice 1)

Question 25 (Choice 2)

Question 26 Important

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Question 28 Important

Question 29 (Choice 1)

Question 29 (Choice 2) Important

Question 30 Important

Question 31 (a)

Question 31 (b) Important

Question 32 (Choice 1)

Question 32 (Choice 2) Important

Question 33 (a)

Question 33 (b)

Question 33 (c) Important

Question 34 (a) - Choice 1

Question 34 (b) - Choice 1 Important

Question 34 (c) - Choice 1

Question 34 (a) - Choice 2 Important

Question 34 (b) - Choice 2]

Question 34 (c) - Choice 2 Important

Question 35 (a) - Choice 1 Important

Question 35 (b) - Choice 1 Important

Question 35 (c) - Choice 1

Question 35 (a) - Choice 2

Question 35 (b) - Choice 2 Important

Question 35 (c) - Choice 2

Question 36 Important

Question 37 (a) - Choice 1 [Case Based]

Question 37 (b) i - Choice 2 [Case Based] Important

Question 37 (b) ii - Choice 2 [Case Based] Important

Question 38 (a) - Choice 1 [Case Based]

Question 38 (b) - Choice 1 [Case Based] Important

Question 38 (c) - Choice 1 [Case Based]

Question 39 (a) - Choice 1 [Case Based] Important

Question 39 (b) - Choice 1 [Case Based]

Question 39 (c) - Choice 1 [Case Based]

Question 39 (d) - Choice 1 [Case Based] Important

Question 39 (d) - Choice 2 [Case Based] Important

Which circuit shows the correct and safe positions for the fuse and the switch?

Which circuit shows - Teachoo.jpg

 

Answer.

The switch and the fuse both are always placed on the live wire

  • This is because, when the switch is off , the appliance should not still be connected to the high voltage from the live wire.
  • Similarly, when the fuse blows , even though current would stop flowing, the appliance would still remain connected to the high voltage live if the fuse were on the neutral wire. This should not happen as it is very dangerous .
  • If the live wire remains connected despite the circuit being incomplete, it would deliver a shock to anyone who comes in contact with the appliance.

circuit shows - Teachoo.jpg

Therefore, the correct answer is A .

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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo