AIPMT 2005 | Dual Nature of Radiation and Matter Question 69 | Physics

A photosensitive metallic surface has work function, h$$\upsilon $$₀. If photons of energy $$2h{\upsilon _0}$$ fall on this surface, the electrons come out with a maximum velocity of 4 $$ \times $$ 10⁶ m/s. When the photon energy is increased to 5 h$$\upsilon $$₀, then maximum velocity of photoelectrons will be

2 $$ \times $$ 10⁷ m/s

2 $$ \times $$ 10⁶ m/s

8 $$ \times $$ 10⁶ m/s

8 $$ \times $$ 10⁵ m/s

AIPMT 2005

MCQ (Single Correct Answer)

-1

The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation the metals which will emit photoelectrons for a radiation of wavelength 4100 $$\mathop A\limits^ \circ $$ is/are

A only

A and B only

all the three metals

none

AIPMT 2004

MCQ (Single Correct Answer)

-1

According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is

AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 34 English Option 1

AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 34 English Option 2

AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 34 English Option 3

AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 34 English Option 4

AIPMT 2003

MCQ (Single Correct Answer)

-1

J.J. Thomson's cathode-ray tube experiment demonstrated that

cathode rays are streams of negatively charged ions

all the maas of an atom is essentially in the nucleus

the e/m of electrons is much greater than the e/m of protons

the e/m ratio of the cathode-ray particles changes when a different gas is placed in the discharge tube

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