1
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

The ratio of frequencies of fundamental harmonic produced by an open pipe to that of closed pipe having the same length is

A
$$2: 1$$
B
$$1: 3$$
C
$$3: 1$$
D
$$1: 2$$
2
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

The net magnetic flux through any closed surface is :

A
Positive
B
Infinity
C
Negative
D
Zero
3
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

The work functions of Caesium $$(\mathrm{Cs})$$, potassium $$(\mathrm{K})$$ and Sodium (Na) are $$2.14 ~\mathrm{eV}, 2.30 ~\mathrm{eV}$$ and $$2.75 ~\mathrm{eV}$$ respectively. If incident electromagnetic radiation has an incident energy of $$2.20 ~\mathrm{eV}$$, which of these photosensitive surfaces may emit photoelectrons?

A
Both Na and K
B
K only
C
Na only
D
Cs only
4
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

The minimum wavelength of $$X$$-rays produced by an electron accelerated through a potential difference of $$V$$ volts is proportional to :

A
$$\frac{1}{V}$$
B
$$\frac{1}{\sqrt{V}}$$
C
$$V^{2}$$
D
$$\sqrt{V}$$
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