TS EAMCET · Physics · Dual Nature of Matter
A light of wavelength \(310 \mathrm{~nm}\) is used in a photoelectric experiment. The metal electrode of work function of \(2.5 \mathrm{eV}\) is used in the experiment. The stopping potential for the photoelectrons will be (assume, \(h c=1240 \mathrm{eV}-\mathrm{nm}\) )
- A 1.0 V
- B 1.5 V
- C 2.0 V
- D 2.5 V
Answer & Solution
Correct Answer
(B) 1.5 V
Step-by-step Solution
Detailed explanation
Work-function of metal surface, \(\phi_0=25 \mathrm{eV}\) Wavelength, \(\lambda=310 \mathrm{~nm} \Rightarrow h c=1240 \mathrm{eV}-\mathrm{nm}\) According to Einstein's photoelectric equation,…
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 work done in blowing a soap bubble of diameter 3 cm is (Surface tension of soap solution \(=0.035 \mathrm{Nm}^{-1}\) )TS EAMCET 2025 Medium
- A message signal of peak voltage 12 V is used to amplitude modulate a carrier signal of frequency 1.2 MHz . The amplitude of the side bands isTS EAMCET 2024 Easy
- If of the power of a light bulb is converted to visible radiation, then the average intensity of visible radiation at a distance of isTS EAMCET 2021 Medium
- Consider a reversible engine of efficiency \(\frac{1}{6}\). When the temperature of the sink is reduced by \(62^{\circ} \mathrm{C}\), its efficiency gets doubled. The temperature of the source and sink respectively areTS EAMCET 2017 Medium
- Two metal spheres have their radii in the ratio of \(4: 7\). They are put in contact and a charge \(8.8 \times 10^{-7} \mathrm{C}\) is given to the system. Then they are separated so that each can exert no influence on the other. The potential due to the smaller sphere at \(60 \mathrm{~m}\) from it in Volt isTS EAMCET 2022 Easy
- The electrostatic potential inside a charged sphere is given as \(V=A r^2+B\), where \(r\) is the distance from the centre of the sphere, \(A\) and \(B\) are constants. Then, the charge density in the sphere isTS EAMCET 2016 Hard
More PYQs from TS EAMCET
- The region in the output voltage versus input voltage graph where a transistor can be used as an amplifier isTS EAMCET 2024 Easy
- A uniform cylinder of radius \(1 \mathrm{~m}\), mass \(1 \mathrm{~kg}\) spins about its axis with an angular velocity \(20 \mathrm{rad} / \mathrm{s}\). At certain moment, the cylinder is placed into a corner as shown in the figure. The coefficient of friction between the horizontal wall and the cylinder is \(\mu\), whereas the vertical wall is frictionless. If the number of rounds made by the cylinder is 5 before it stops, then the value of \(\mu\) is (acceleration due to gravity, \(g=10 \mathrm{~m} / \mathrm{s}^2\) )
TS EAMCET 2018 Hard - A charge q is placed at the centre ' O ' of a circle of radius R and two other charges q and q are placed at the ends of the diameter AB of the circle. The work done to move the charge at point B along the circumference of the circle to a point C as shown in the figure is
TS EAMCET 2025 Medium - Three bodies a ring, a solid cylinder and a solid sphere roll down an inclined plane without slipping. They start from rest. Which of the bodies reaches bottom of plane with minimum velocity?TS EAMCET 2021 Easy
- The output characteristics of an \(n-p-n\) transistor represent, ( \(I_C=\) collector current, \(V_{C E}=\) potential difference between collector and emitter, \(I_B=\) base current, \(V_{B B}=\) voltage given to base, \(V_{B E}=\) the potential difference between base and emitter)TS EAMCET 2014 Medium
- The equation of a transverse wave propagating on a stretched string is given by \(y=3 \sin (4 x+200 \mathrm{t})\), where \(x\) and \(y\) are in metre and the time ' t ' is in second. If the tension applied to the string is 500 N, the linear density of the string isTS EAMCET 2025 Medium