NEET Physics: Questions 1590 - 1594 of 2099
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Question number: 1590
Which of the following materials are crystalline?
(1) Copper (2) Sodium chloride
(3) Diamond (4) Wood
Select the correct answers and mark it according to the following codes:
2 and 4 are correct
1, 2 and 3 are correct
1 and 3 are correct
1 and 2 are correct
Question number: 1591
Question number: 1592
The temperature coefficient of resistance is positive for p-type semiconductors and negative for n-type semiconductors.
The effective charge carries in p-type semiconductors and holes and in n-type semiconductors are electrons.
|a.||Ꭺ is false but Ꭱ is true|
|b.||Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ|
|c.||Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ|
|d.||Ꭺ is true but Ꭱ is false|
Question number: 1593
Three masses 600g, 300g, and 200g are suspended at the end of a spring are in equilibrium. When the 600g mass is removed, the system oscillates with a period of 4 seconds, when the 300 gm mass is also removed, it will oscillate with a period of