MHT CET · Physics · Dual Nature of Matter
Light of incident frequency 2 times the threshold frequency is incident on a photosensitive material. If the incident frequency is made \(\left(\frac{1}{3}\right)^{\text {rd }}\) and intensity is doubled then the photoelectric current will
- A decrease.
- B increase.
- C be halved.
- D be zero.
Answer & Solution
Correct Answer
(D) be zero.
Step-by-step Solution
Detailed explanation
\(f_{initial} = 2f_0 > f_0\) \(f_{final} = \frac{1}{3} (2f_0) = \frac{2}{3}f_0\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The reactance of capacitor at \(50 \mathrm{~Hz}\) is \(5 \Omega\). If the frequency is increased to \(100 \mathrm{~Hz}\), the new reactance isMHT CET 2023 Medium
- An air filled parallel plate capacitor has a uniform electric field 'E' in the space between the plates. If the distance between the plates is 'd' and area of each plate is ' \(A^{\prime}\), the energy stored in the capacitor is \(\left(\epsilon_{0}=\right.\) permittivity of free space)MHT CET 2020 Medium
- A step down transformer is used to reduce the main supply from ' \(V_1\) ' volt to ' \(V_2\) ' volt. The primary coil draws a current ' \(I_1\) ' A and the secondary coil draws ' \(I_2\) ' A. \(\left(I_1 < I_2\right)\). The ratio of input power to output power isMHT CET 2021 Medium
- Lenz's law is a consequence of law of conservation ofMHT CET 2012 Easy
- The force between the plates of a parallel plate capacitor of capacitance \(C\) and distance of separation of the plates \(d\) with a potential difference \(V\) between the plate isMHT CET 2022 Easy
- In hydrogen atoms, transition from the state \(n=6\) to \(n=1\) result in ultraviolet radiation.
Infrared radiation will be obtained in the transitionMHT CET 2022 Medium
More PYQs from MHT CET
- In a thermodynamic system, ' \(W\) ' represents the work done by the system and ' \(\Delta U\) ' is the increase in internal energy. Which of the following statements is TRUE?MHT CET 2022 Easy
- Consider the statements given by following
(A) If \(4+3=8\), then \(5+3=9\)
(B) If \(6+4=10\), then moon is flat
(C) If both (A) and (B) are true, then \(5+6=17\)
Then which of the following statement is correct?MHT CET 2025 Medium - Two waves of same frequency \(n\) are approaching each other with same velocity, \(v=20 \mathrm{~m} / \mathrm{s}\) and interfere. The distance between two consecutive nodes isMHT CET 2022 Easy
- Let \(\mathrm{f}(x)= \begin{cases}\frac{x^4-5 x^2+4}{|(x-1)(x-2)|} & , x \neq 1,2 \\ 6 & , x=1 \\ 12 & , x=2\end{cases}\) then \(\mathrm{f}(x)\) is continuous on the setMHT CET 2025 Medium
- If A and B are two angles such that A, B, \(\in(0, \pi)\) and they are not supplementary
angles such that \(\sin A-\sin B=0\), thenMHT CET 2020 Easy - If \(\int e^{x^2} \cdot x^3 d x=e^{x^2} f(x)+C\)
(where \(C\) is a constant of integration)
and \(f(1)=0\), then value of \(f(2)\) will beMHT CET 2022 Easy