NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1514 - 1518 of 5119
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Question 1514
Question MCQ▾
1 7 calories of heat are required to raise the temperature 2 moles of an ideal gas at constant pressure from 30°C to 35°C The amount of heat required to rise the temperature of same gas through the same range (30° C to 35° C) at constant volume (R = 2 Cal/mole K)
Choices
Choice (4) | Response | |
---|---|---|
a. | 30 Cal | |
b. | 50 Cal | |
c. | 70 Cal | |
d. | 450 Cal |
Question 1515
Question MCQ▾
Efficiency of a Carnot engine is 50% when temperature of outlet is 500 K. In order to increase efficiency up to 60% keeping temperature of intake the same what will be temperature of outlet
Choices
Choice (4) | Response | |
---|---|---|
a. | 800 K | |
b. | 600 K | |
c. | 400 K | |
d. | 200 K |
Question 1516
Question MCQ▾
Gas at a pressure P0 is contained in a vessel. If the mass of all the molecules are halved and their speeds an doubled, the resulting pressure p will be equal to
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 1517
Question MCQ▾
Energy of each photon obtained in the pair production process will be, if the mass of electron or positron is a. m. u-
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.213 MeV | |
b. | 0.321 MeV | |
c. | 0.465 MeV | |
d. | 0.123 MeV |
Question 1518
Question MCQ▾
Half-life of Bi210 is 5 days. If we start with 50,000 atoms of this isotope, the number of atoms left over after 10 days is
Choices
Choice (4) | Response | |
---|---|---|
a. | 5,000 | |
b. | 12,500 | |
c. | 25,000 | |
d. | 20,000 |