NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1339 - 1342 of 5119
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Question 1339
Question MCQ▾
V0 and VE represent the velocities, µ0 and μE the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then
Choices
Choice (4) | Response | |
---|---|---|
a. | if the crystal is calcite | |
b. | if the crystal is quartz | |
c. | if the crystal is quartz | |
d. | if the crystal is calcite |
Question 1340
Question MCQ▾
A uniform steel wire of density 7500 kg/m3 is 2.5 m long and weighs 15.6 × 10-3 kg. It extends by 1.25 mm when loaded by 10 kg. Calculate the value of young՚s modulus of elasticity for steel.
Choices
Choice (4) | Response | |
---|---|---|
a. | 2.3 × 1011 N/m2 | |
b. | 19.6 × 1011 N/m2 | |
c. | 2.96 × 1011 N/m2 | |
d. | Question does not provide sufficient data or is vague |
Question 1341
Question MCQ▾
In the given diagram, CP represents a wavefront and AO & BP, the corresponding two rays. Find the condition on θ for constructive interference at P between the ray BP and reflected ray OP
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 1342
Question MCQ▾
One mole of an ideal gas expands at a constant temperature of 300 K from an initial volume of 10 litres to a final volume of 20 litres. The work done in expanding the gas is
(R = 8.31J/mole-K)
Choices
Choice (4) | Response | |
---|---|---|
a. | 1728 Joules | |
b. | 750 Joules | |
c. | 1500 Joules | |
d. | 3456 Joules |