EASY

TS EAMCET

IMPORTANT

Earn 100

The de-Broglie wavelength of an electron having kinetic energy $100 eV$ is,
[Use $h = 4.14 \times 10^{- 15} eVs,$ mass of electron $= \frac{0.5 \times 10^{6}}{c^{2}} eV, 1 pm = 10^{- 12} m$ ]

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Important Questions on Dual Nature of Matter and Radiation

MEDIUM

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET 2019 (03-May Shift-2)>Q 1

A photodiode sensor is used to measure the output of a

300 W

lamp kept

10 m

away The sensor has an opening of

2 cm

in diameter. How many photons enter the sensor if the wavelength of the light is

660 nm

and the exposure time is

100 m s

. (Assume that all the energy of the lamp is given off as light and

h = 6.6 \times 10^{- 34} J s

)

EASY

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET 2019 (03-May Shift-2)>Q 2

To excite the spectral line of wavelength

4960 \overset{\circ}{A}

of an atom, an excitation energy of

7.7 eV

is required. The ground state energy of the atom is

10.5 eV

. The energies of two levels involved in the emission of

4960 \overset{\circ}{A}

line are (Assume,

h c = 1240 eV nm

, where

h

is Planck's constant and

c

is speed of light)

EASY

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET 2020 (9-Sep Shift-1)>Q 3

A beam of photons with an energy of

10.5 eV

strike a metal plate. The photoelectrons are emitted with maximum velocity of

1.6 \times 10^{6} m s^{- 1}

. The work function of the metal is
(Assume mass of electron

= 9 \times 10^{- 31} kg

and Charge of electron

= 1.6 \times 10^{- 19} C

)

MEDIUM

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET 2018 (04-May Shift-1)>Q 4

At an incident radiation frequency of

v_{1}

, which is greater than the threshold frequency, the stopping potential for a certain metal is

V_{1}

. At frequency

2 v_{1}

the stopping potential is

3 V_{1}

. If the stopping potential at frequency

4 v_{1}

n V_{1}

, then

n

EASY

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET 2021 (04-Aug Shift-2)>Q 5

The work function of a metal is

h v_{0}

. Light of frequency

v

falls on this metal. The photoelectric effect will take place only if

EASY

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET 2018 (04-May Shift-1)>Q 6

The de Broglie wavelength of an electron of kinetic energy

9 eV

is (take

h = 4 \times 10^{- 15} eV . \sec

c = 3 \times 10^{10} cm \sec^{- 1}

and the mass

m_{e}

of electron as

m_{e} c^{2} = 0.5 MeV

)

EASY

TS EAMCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET 2021 (04-Aug Shift-1)>Q 7

Which of the following particle has the shortest de-Broglie wavelength?

EASY

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 26 - Dual Nature of Matter and Radiation>TS EAMCET - 5 August 2021 Shift 1>Q 8

The de-Broglie wavelength of an electron having kinetic energy

100 eV

is,
[Use

h = 4.14 \times 10^{- 15} eVs,

mass of electron

= \frac{0.5 \times 10^{6}}{c^{2}} eV, 1 pm = 10^{- 12} m

]

The de-Broglie wavelength of an electron having kinetic energy 100 eV is, [Use h=4.14×10-15 eVs, mass of electron =0.5×106c2eV, 1pm=10-12 m]

Important Questions on Dual Nature of Matter and Radiation

Learn and Prepare for any exam you want !

The de-Broglie wavelength of an electron having kinetic energy $100 eV$ is,
[Use $h = 4.14 \times 10^{- 15} eVs,$ mass of electron $= \frac{0.5 \times 10^{6}}{c^{2}} eV, 1 pm = 10^{- 12} m$ ]