AIIMS (All India Institute of Medical Sciences) Physics: Questions 160 - 164 of 500
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Question number: 160
» Dual Nature of Matter and Radiation » Black-Body Radiation
Appeared in Year: 2003
Question
A black body, at a temperature of 227°C, radiates heat at a rate of . When its temperature is raised to 727°C, the heat radiated by it in will be closest to –
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 40 | |
b. | 320 | |
c. | 640 | |
d. | 160 | |
Question number: 161
» Communication System » Sky and Space Wave Propagation
Appeared in Year: 2005
Question
For sky wave propagation of a 10 MHz signal, what should be the minimum electron density in ionosphere –
Choices
| Choice (4) | Response | |
|---|---|---|
a. |
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b. |
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c. |
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d. |
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Question number: 162
» Oscillations and Waves » Doppler Effect in Sound
Appeared in Year: 2002
Question
A siren emitting sound of frequency 800 Hz is going away from a static listener with a speed of . Frequency of sound to be heard by the listener is (Velocity of sound )
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 286.5 Hz | |
b. | 644.8 Hz | |
c. | 733.3 Hz | |
d. | 481.2 Hz | |
Question number: 163
» Oscillations and Waves » Simple Harmonic Motion » Energy
Appeared in Year: 2001
Question
A sings with a frequency (n) and B sings with a frequency that of A. If the energy remains the same and the amplitude of A is a, then amplitude of B will be –
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 4a | |
b. | 2a | |
c. | a | |
d. | 8a | |
Question number: 164
» Kinetic Theory of Gases » Equation of State of a Perfect Gas
Appeared in Year: 1982
Question
Two gases of equal molar mass are in thermal equilibrium. If , , and are their respective pressures and volumes, then which relation is true –
Choices
| Choice (4) | Response | |
|---|---|---|
a. |
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b. |
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c. |
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d. |
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