MCQ
What is the stopping potential when the metal with work function $0.6 eV$ is illuminated with the light of $2 eV$ ............ $V$
- A$2.6 $
- B$3.6 $
- C$0.8 $
- ✓$1.4 $
✓
Answer
Correct option: D.
$1.4 $
d
(d) ${V_0} = \frac{{(E - {W_0})}}{e} = \frac{{(2eV - 0.6\,eV)}}{e} = 1.4V$
(d) ${V_0} = \frac{{(E - {W_0})}}{e} = \frac{{(2eV - 0.6\,eV)}}{e} = 1.4V$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In refraction, light waves are bent on passing from one medium to the second medium, because, in the second medium
Heat given to a system is $35$ joules and work done by the system is $15$ joules. The change in the internal energy of the system will be ..... $J$
→Chromatic aberration of lens can be corrected by
A particle moves in a circle of radius $5 \;cm$ with constant speed and time period $0.2 \pi\; sec$. The acceleration of the particle is .... $m/sec^2$
→Which of the following statements are true regarding radioactivity
→$(I)$ All radioactive elements decay exponentially with time
$(II)$ Half life time of a radioactive element is time required for one half of the radioactive atoms to disintegrate
$(III)$ Age of earth can be determined with the help of radioactive dating
$(IV)$ Half life time of a radioactive element is $50\%$ of its average life periodSelect correct answer using the codes given belowCodes :
A current of $2\,A$ flows through a $2\,\Omega$ resistor when connected across a battery. The same battery supplies a current of $0.5\,\, A$ when connected across a $9 \,\,\Omega$ resistor. The internal resistance of the battery is
→Two point charges $4\,\mu C$ and $ - 1\,\mu C$ are kept at a distance of $3\ m$ from each other. What is the electric potential at the point where the electric field is zero?......$V$
→Two parallel plate capacitors have their plate areas $100 \,cm ^2$ and $500 \,cm ^2$ respectively. If they have the same charge and potential and the distance between the plates of the first capacitor is $0.5 \,mm$, then the distance between the plates of the second capacitor is ........ $cm$
→A short sighted person can see distinctly only those objects which lie between $10\, cm$ and $100\, cm$ from him. The power of the spectacle lens required to see a distant object is
→$A$ student calculates the acceleration of $m_1$ in figure shown as ${a_1} = \frac{{({m_1} - {m_2})\,g}}{{{m_1}\, + \,{m_2}}}\,$. Which assumption is not required to do this calculation.
→