1
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

The stopping potential (V0) versus frequency $$\nu $$ of a graph for photoelectric effect in a metal. From the graph, the Plank's constant (h) is

BITSAT 2022 Physics - Dual Nature of Radiation Question 4 English

A
6.60 $$\times$$ 10$$-$$34 J-s
B
6.69 $$\times$$ 10$$-$$34 J-s
C
6.62 $$\times$$ 10$$-$$34 J-s
D
6.63 $$\times$$ 10$$-$$34 J-s
2
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

The de-Broglie wavelength of an electron moving with a velocity $$\frac{c}{3}$$ (c = 3 $$\times$$ 108 m/s) is equal to the wavelength of photon. The ratio of the kinetic energies of electron and photon is

A
1 : 4
B
1 : 3
C
1 : 2
D
2 : 1
3
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

The potential difference applied to an X-ray tube is decreased. As a result, in the emitted radiation,

A
the intensity increases
B
the intensity decreases
C
the minimum wavelength increases
D
the minimum wavelength decreases
4
BITSAT 2020
MCQ (Single Correct Answer)
+3
-1
Lights of two different frequencies whose photons have energies 1.5 eV and 2.5 eV respectively illuminate a metallic surface whose work function is 0.5 eV successively. Ratio of maximum speeds of emitted electrons will be
A
3 : 2
B
2 : 3
C
$$\sqrt3$$ : $$\sqrt2$$
D
$$1 :\sqrt 2 $$
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