Einstein's Photoelectric Equation(Particle Nature of Light) NEET Questions

Einstein's Photoelectric Equation(Particle Nature of Light) MCQ Questions

13.
Higher work function metals have:
A.
Higher threshold frequency (require higher-energy photons)
B.
Negative threshold frequency
C.
Lower threshold frequency
D.
Same threshold frequency as low-ฯ†โ‚€ metals
ANSWER :
A. Higher threshold frequency (require higher-energy photons)
14.
Combining Kโ‚˜โ‚โ‚“ = eVโ‚€ with Einstein's equation gives the Vโ‚€-vs-ฮฝ relation:
A.
Vโ‚€ = hยทฮฝยทฯ†โ‚€
B.
Vโ‚€ = (h/e)ฮฝ + ฯ†โ‚€/e
C.
Vโ‚€ = (e/h)ฮฝ + ฯ†โ‚€
D.
Vโ‚€ = (h/e)ฮฝ โˆ’ ฯ†โ‚€/e
ANSWER :
D. Vโ‚€ = (h/e)ฮฝ โˆ’ ฯ†โ‚€/e
15.
The slope of the Vโ‚€ vs ฮฝ straight-line graph is:
A.
ฯ†โ‚€/e
B.
h ร— e
C.
e/h
D.
h/e (independent of metal)
ANSWER :
D. h/e (independent of metal)
16.
The y-intercept of the Vโ‚€ vs ฮฝ graph is:
A.
โˆ’ฯ†โ‚€/e
B.
+ฯ†โ‚€/e
C.
โˆ’h/e
D.
+h/e
ANSWER :
A. โˆ’ฯ†โ‚€/e
17.
On the Vโ‚€-vs-ฮฝ graph, the x-axis intercept (Vโ‚€ = 0) corresponds to:
A.
Threshold frequency ฮฝโ‚€ = ฯ†โ‚€/h
B.
Zero frequency
C.
Maximum frequency
D.
Speed of light
ANSWER :
A. Threshold frequency ฮฝโ‚€ = ฯ†โ‚€/h
18.
Millikan performed his series of experiments on photoelectric effect during:
A.
1888-1905
B.
1879-1887
C.
1921-1930
D.
1906-1916
ANSWER :
D. 1906-1916