Dual Nature Of Light Question 459
Question: In producing X-rays a beam of electrons accelerated by a potential difference V is made to strike a metal target. For what value of V, X-rays will have the lowest wavelength of 0.3094 Å [CPMT 1982; NCERT 1986, 87]
Options:
A) 10 kV
B) 20 kV
C) 30 kV
D) 40 Kv
Show Answer
Answer:
Correct Answer: D
Solution:
From the formula $ V=\frac{12375}{{\lambda_{\min }}}=\frac{12375}{0.3094} $ $ =39.99kV,\approx ,40,kV $
BETA
