1
NEET 2024 (Re-Examination)
+4
-1

An electron and an alpha particle are accelerated by the same potential difference. Let $$\lambda_e$$ and $$\lambda_\alpha$$ denote the de-Broglie wavelengths of the electron and the alpha particle, respectively, then:

A
$$\lambda_e>\lambda_\alpha$$
B
$$\lambda_e=4 \lambda_\alpha$$
C
$$\lambda_e=\lambda_\alpha$$
D
$$\lambda_e<\lambda_\alpha$$
2
NEET 2024 (Re-Examination)
+4
-1

If $$\phi$$ is the work function of photosensitive material in $$\mathrm{eV}$$ and light of wavelength of numerical value $$\lambda=\frac{h c}{e}$$ metre, is incident on it with energy above its threshold value at an instant then the maximum kinetic energy of the photo-electron ejected by it at that instant (Take $$h$$-Plank's constant, $$c$$-velocity of light in free space) is (in SI units):

A
$$e+2 \phi$$
B
$$2 e-\phi$$
C
$$e-\phi$$
D
$$e+\phi$$
3
NEET 2024
+4
-1

The graph which shows the variation of $$\left(\frac{1}{\lambda^2}\right)$$ and its kinetic energy, $$E$$ is (where $$\lambda$$ is de Broglie wavelength of a free particle):

A
B
C
D
4
NEET 2024
+4
-1

If $$c$$ is the velocity of light in free space, the correct statements about photon among the following are:

A. The energy of a photon is $$E=h v$$.

B. The velocity of a photon is $$c$$.

C. The momentum of a photon, $$p=\frac{h v}{c}$$.

D. In a photon-electron collision, both total energy and total momentum are conserved.

E. Photon possesses positive charge.

Choose the correct answer from the options given below:

A
A and B only
B
A, B, C and D only
C
A, C and D only
D
A, B, D and E only
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