1
KCET 2021
MCQ (Single Correct Answer)
+1
-0

The work-function of a metal is 1 eV. Light of wavelength $$3000 \mathop A\limits^o$$ is incident on this metal surface. The velocity of emitted photoelectrons will be

A
$$10 \mathrm{~ms}^{-1}$$
B
$$1 \times 10^3 \mathrm{~ms}^{-1}$$
C
$$1 \times 10^4 \mathrm{~ms}^{-1}$$
D
$$1 \times 10^6 \mathrm{~ms}^{-1}$$
2
KCET 2021
MCQ (Single Correct Answer)
+1
-0

A proton moving with a momentum $$p_1$$ has a kinetic energy $$1 / 8$$th of its rest mass-energy. Another light photon having energy equal to the kinetic energy of the possesses a momentum $$p_2$$. Then, the ratio $$\frac{p_1-p_2}{p_1}$$ is equal to

A
1
B
1/4
C
1/2
D
3/4
3
KCET 2021
MCQ (Single Correct Answer)
+1
-0

According to Einstein's photoelectric equation to the graph between kinetic energy of photoelectrons ejected and the frequency of incident radiation is

A
KCET 2021 Physics - Dual Nature of Radiation Question 1 English Option 1
B
KCET 2021 Physics - Dual Nature of Radiation Question 1 English Option 2
C
KCET 2021 Physics - Dual Nature of Radiation Question 1 English Option 3
D
KCET 2021 Physics - Dual Nature of Radiation Question 1 English Option 4
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