Radiation of energy 'E' falls normally on a perfectly reflecting surface. The momentum transferred to the surface is:

(c = velocity of light)

1. \(E \over c\)

2. \(2E \over c\)

3. \(2E \over c^2\)

4. \(E \over c^2\)

Subtopic: Photoelectric Effect: Experiment |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's **Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**

A certain metallic surface is illuminated with monochromatic light of wavelength $\mathrm{\lambda}$. The stopping potential for photoelectric current for this light is 3V_{0}. If the same surface is illuminated with a light of wavelength 2$\mathrm{\lambda}$, the stopping potential is V_{0}. The threshold wavelength for this surface for the photoelectric effect is:

1. $6\mathrm{\lambda}$

2. $4\mathrm{\lambda}$

3. $\frac{\mathrm{\lambda}}{4}$

4. $\frac{\mathrm{\lambda}}{6}$

Subtopic: Einstein's Photoelectric Equation |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's **Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**

Which of the following figures represent the variation of the particle momentum and the associated de-Broglie wavelength?

1. | 2. | ||

3. | 4. |

Subtopic: De-broglie Wavelength |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

Prefer Books for Question Practice? Get NEETprep's **Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**

When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increases from 0.5 eV to 0.8 eV. The work function of the metal is:

1. 0.65 eV

2. 1.0 eV

3. 1.3 eV

4. 1.5 eV

Subtopic: Einstein's Photoelectric Equation |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

**Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**

If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-Broglie wavelength of the particle is :

1. 25

2. 75

3. 60

4. 50

Subtopic: De-broglie Wavelength |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

**Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**

For photoelectric emission from certain metals, the cutoff frequency is $\nu $. If radiation of frequency 2$\mathrm{\nu}$ impinges on the metal plate, the maximum possible velocity of the emitted electron will be:

(m is the electron mass)

1. $\sqrt{\mathrm{h\nu}/\mathrm{m}}$

2. $\sqrt{2\mathrm{h\nu}/\mathrm{m}}$

3. $2\sqrt{\mathrm{h\nu}/\mathrm{m}}$

4. $\sqrt{\mathrm{h\nu}/\left(2\mathrm{m}\right)}$

Subtopic: Einstein's Photoelectric Equation |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

**Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**

The wavelength λ_{e} of an electron and λ_{P} of a photon of same energy E are related by :

1. λ_{P} ∝ λ_{e}

2. λ_{P} ∝ $\sqrt{{\lambda}_{e}}$

3. λ_{P} ∝ $\frac{1}{\sqrt{{\lambda}_{e}}}$

4. λ_{P} ∝ λ_{e}^{2}

2. λ

3. λ

4. λ

Subtopic: De-broglie Wavelength |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

**Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**

A 200 W sodium street lamp emits yellow light of wavelength 0.6 $\mathrm{\mu m}$. Assuming it to be 25% efficient in converting electrical energy to light, the number of photons of yellow light it emits per second is

1. $1.5\times {10}^{20}$

2. $6\times {10}^{18}$

3. $62\times {10}^{20}$

4. $3\times {10}^{19}$

Subtopic: Photoelectric Effect: Experiment |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

**Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**

An $\mathrm{\alpha}$-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m^{2}. The de-Broglie wavelength associated with the particle will be :

$1.\; 1\stackrel{\mathrm{o}}{\mathrm{A}}$

Subtopic: De-broglie Wavelength |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

**Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**

In the Davisson and Germer experiment, the velocity of electrons emitted from the electron gun can be increased by:

1. | increasing the filament current. |

2. | decreasing the filament current. |

3. | decreasing the potential difference between the anode and filament. |

4. | increasing the potential difference between the anode and filament. |

Subtopic: Davisson & Germer Experiment |

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

To view explanation, please take trial in the course below.

NEET 2023 - Target Batch - Aryan Raj Singh

Please attempt this question first.

Launched MCQ Practice Books

**Unique MCQ Books** with Online **Audio/Video/Text Solutions via Telegram Bot**