1
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A light of intensity $$12 \mathrm{Wm}^{-2}$$ incidents on a black surface of area $$4 \mathrm{~cm}^2$$. The radiation pressure on the surface is

A
$$1 \times 10^{-8} \mathrm{~Pa}$$
B
$$4 \times 10^{-8} \mathrm{~Pa}$$
C
$$1.6 \times 10^{-7} \mathrm{~Pa}$$
D
$$4.8 \times 10^{-7} \mathrm{~Pa}$$
2
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

The electric field $$(E)$$ and magnetic field $$(B)$$ of an electromagnetic wave passing through vacuum are given by

$$\begin{aligned} & E=E_0 \sin (k x-\omega t) \\ & B=B_0 \sin (k x-\omega t) \end{aligned}$$

Then the correct statement among the following is

A
$$E_0 k=B_0 \omega$$
B
$$E_0 \omega=B_0 k$$
C
$$E_0 B_0=\omega k$$
D
$$E_0 B_0=\frac{\omega}{k}$$
3
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a photoelectric experiment light of wavelength 800 nm produces photoelectrons with the smallest de-Broglie wavelength of 1 nm . Light of 400 nm produces photoelectrons with smallest de-Broglie wavelength of 0.5 nm. Then the work function of the metal used in the experiment is nearly.

A
1.03 eV
B
0.53 eV
C
2.03 eV
D
4.02 eV
4
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A hydrogen atom at the ground level absorbs a photon and is excited n = 4 level. The potential energy of the electron in the excited state is

A
$$-$$0.85 eV
B
$$+$$0.85 eV
C
$$-$$1.7 eV
D
$$+$$1.7 eV
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