Dual Nature of Matter and Radiation-Photoelectric Effect [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 1 - 5 of 19
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Question 1
Question MCQ▾
Quantum nature of light is explained by which of the following phenomenon?
Choices
Choice (4) | Response | |
---|---|---|
a. | Huygens wave theory | |
b. | Photoelectric effect | |
c. | Maxwell electromagnetic theory | |
d. | de- Broglie theory |
Question 2
Question MCQ▾
Light of wavelength 3320 A is incident on metal surface (work function = 1.07 eV) . To stop emission of photo electron, retarding potential required to be
(Take hc = 12420 eV- Å)
Choices
Choice (4) | Response | |
---|---|---|
a. | 2.67 V | |
b. | 3.74 V | |
c. | 4.81V | |
d. | 1.07 V |
Question 3
Question MCQ▾
The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let Ia , Ib and Ic , be the intensities and fa , fb and fc be the frequencies for the curves a, b and c respectively. Then,
Choices
Choice (4) | Response | |
---|---|---|
a. | f a = f c & I a = I c | |
b. | ||
c. | ||
d. |
Question 4
Appeared in Year: 2004 (AIIMS)
Question MCQ▾
A photon of energy 4 eV is incident on a metal surface whose work function is 2eV. The minimum reverse potential to be applied for stopping the emission of electrons is – [AIIMS]
Choices
Choice (4) | Response | |
---|---|---|
a. | 8V | |
b. | 4V | |
c. | 2V | |
d. | 6V |
Question 5
Appeared in Year: 2006 (AIIMS)
Question MCQ▾
In photoelectric effect, the electrons are ejected from metals if the incident light has a certain minimum – [AIIMS]
Choices
Choice (4) | Response | |
---|---|---|
a. | Angle of incidence | |
b. | Wavelength | |
c. | Frequency | |
d. | Amplitude |