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Electrons with de- Broglie wavelength fall on the target in a

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Electrons with de- Broglie wavelength $λ$ fall on the target in an X -ray tube. The cut- off wavelength of the emitted X-rays is

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Electrons with de- Broglie wavelength

λ

fall on the target in an X -ray tube. The cut- off wavelength of the emitted X-rays is

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Practice questions from similar books

Question 1

Let

S

be the set of all column matrices

[b_{1} b_{2} b_{3}]

such that

b_{1}, b_{2}, b_{3} \in R

and the system of equations (in real variable)

- x + 2 y + 5 z = b_{1}

2 x - 4 y + 3 z = b_{2}

x - 2 y + 2 z = b_{3}

has at least one solution. Then, which of the following system(s) (in real variables) has (have) at least one solution for each

[b_{1} b_{2} b_{3}] \in S

?(a)

x + 2 y + 3 z = b_{1}, 4 y + 5 z = b_{2}

and

x + 2 y + 6 z = b_{3}

(b)

x + y + 3 z = b_{1}, 5 x + 2 y + 6 z = b_{2}

and

- 2 x - y - 3 z = b_{3}

(c)

- x + 2 y - 5 z = b_{1}, 2 x - 4 y + 10 z = b_{2}

and

x - 2 y + 5 z = b_{3}

(d)

x + 2 y + 5 z = b_{1}, 2 x + 3 z = b_{2}

and

x + 4 y - 5 z = b_{3}

View solution

Question 2

Let n be the number of ways in which 5 boys and 5 girls can stand in a queue in such a way that all the girls stand consecutively in the queue. Let m be the number in which 5 boys and 5 girls stand in such a way that exactly four girls stand consecutively in the queue. Then the value of

\frac{m}{n}

is ____

View solution

Question 3

Let

[x]

be the greatest integer less than or equal to

x ˙

Then, at which of the following point (s) function

f (x) = x cos (π (x + [x]))

is discontinuous? (a)

x = 1

(b)

x = - 1

(c)

x = 0

(d)

x = 2

View solution

Question 4

Let w = (

3 + \frac{ι}{2})

and

P = {w^{n} : n = 1, 2, 3, \dots ..},

Further

H_{1} = {z \in C : R e (z) > \frac{1}{2}} and H_{2} = {z \in c : R e (z) < - \frac{1}{2}}

Where C is set of all complex numbers. If

z_{1} \in P \cap H_{1}, z_{2} \in P \cap H_{2}

and O represent the origin, then

∠ Z_{1} O Z_{2}

View solution

Question Text

Electrons with de- Broglie wavelength

λ

fall on the target in an X -ray tube. The cut- off wavelength of the emitted X-rays is

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