1
TG EAPCET 2025 (Online) 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the radiation emitted by a perfect radiator has maximum intensity at a wavelength of $2900 \mathop {\rm{A}}\limits^{\rm{o}}$, the intensity of radiation emitted by it is

(Stefan-Boltzmann's constant $=5.67 \times 10^{-8} \mathrm{Wm}^{-2} \mathrm{~K}^{-4}$ and Wein's constant $=2.9 \times 10^{-3} \mathrm{mK}$ )

A

$5.67 \times 10^8 \mathrm{Wm}^{-2}$

B

$5.67 \mathrm{Wm}^{-2}$

C

$5670 \mathrm{Wm}^{-2}$

D

$2.9 \mathrm{Wm}^{-2}$

2
TG EAPCET 2025 (Online) 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of the work done, change in internal energy and heat absorbed when a diatomic gas expands at constant pressure is

A

$2: 3: 5$

B

$7: 5: 2$

C

$5: 3: 2$

D

$2: 5: 7$

3
TG EAPCET 2025 (Online) 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the temperature of a gas is increased from $127^{\circ} \mathrm{C}$ to $527^{\circ} \mathrm{C}$, then the rms speed of the gas molecules

A

increases by 4 times

B

becomes $\sqrt{2}$ times

C

becomes half

D

decreases by $\sqrt{2}$ times

4
TG EAPCET 2025 (Online) 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

An air column in a tube of length 50 cm , closed at one end is vibrating in its fifth harmonic. The phase difference between a particle at the open end and a particle at 42 cm from the open end is

A

$90^{\circ}$

B

$18^{\circ}$

C

$0^{\circ}$

D

$270^{\circ}$

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