?
Categories
Account

Modern Physics

Download Q&A
Q. What is the band gap energy of a typical semiconductor?
  • A. 0 eV
  • B. 1-3 eV
  • C. 5 eV
  • D. 10 eV
Q. What is the band gap energy of a typical silicon semiconductor?
  • A. 0.1 eV
  • B. 1.1 eV
  • C. 2.0 eV
  • D. 3.5 eV
Q. What is the band gap energy of silicon at room temperature?
  • A. 0.1 eV
  • B. 1.1 eV
  • C. 2.0 eV
  • D. 3.5 eV
Q. What is the bandwidth of a signal that has a frequency range from 300 Hz to 3 kHz?
  • A. 2.7 kHz
  • B. 3.3 kHz
  • C. 2.4 kHz
  • D. 3.0 kHz
Q. What is the bandwidth of a signal that occupies a frequency range from 1 kHz to 3 kHz?
  • A. 1 kHz
  • B. 2 kHz
  • C. 3 kHz
  • D. 4 kHz
Q. What is the bandwidth of a signal that occupies a frequency range from 300 Hz to 3 kHz?
  • A. 2.7 kHz
  • B. 3.3 kHz
  • C. 2.4 kHz
  • D. 3.0 kHz
Q. What is the binding energy of a nucleus?
  • A. Energy required to remove a nucleon
  • B. Energy released during nuclear fusion
  • C. Energy required to split the nucleus
  • D. Energy required to form the nucleus from its constituents
Q. What is the binding energy per nucleon for a stable nucleus?
  • A. Less than 1 MeV
  • B. About 8 MeV
  • C. More than 10 MeV
  • D. Zero
Q. What is the critical mass in nuclear fission?
  • A. Mass required for a chain reaction
  • B. Mass of a single nucleus
  • C. Mass of the entire reactor
  • D. Mass of fuel rods
Q. What is the critical mass in nuclear physics?
  • A. Mass required for a stable nucleus
  • B. Mass required to sustain a nuclear chain reaction
  • C. Mass of a neutron
  • D. Mass of a proton
Q. What is the de Broglie wavelength of an electron moving with a velocity of 1.5 x 10^6 m/s? (mass of electron = 9.11 x 10^-31 kg)
  • A. 4.86 x 10^-10 m
  • B. 2.42 x 10^-10 m
  • C. 1.33 x 10^-10 m
  • D. 6.63 x 10^-10 m
Q. What is the effect of doping a semiconductor with acceptor impurities?
  • A. Increases electron concentration
  • B. Increases hole concentration
  • C. Decreases conductivity
  • D. No effect
Q. What is the effect of doping a semiconductor with donor atoms?
  • A. Increases hole concentration
  • B. Increases electron concentration
  • C. Decreases conductivity
  • D. Creates a depletion region
Q. What is the effect of doping a semiconductor with trivalent atoms?
  • A. Creates n-type
  • B. Creates p-type
  • C. No effect
  • D. Increases resistance
Q. What is the effect of doping a semiconductor?
  • A. Increases resistance
  • B. Decreases resistance
  • C. No effect
  • D. Makes it an insulator
Q. What is the effect of doping on the conductivity of a semiconductor?
  • A. Decreases conductivity
  • B. Increases conductivity
  • C. No effect
  • D. Makes it an insulator
Q. What is the effect of doping on the conductivity of semiconductors?
  • A. Decreases conductivity
  • B. Increases conductivity
  • C. No effect
  • D. Makes it insulative
Q. What is the effect of increasing the bandwidth of a communication channel?
  • A. Increased data rate
  • B. Decreased data rate
  • C. No effect on data rate
  • D. Increased noise
Q. What is the effect of increasing the frequency of incident light on the photoelectric current?
  • A. Increases indefinitely
  • B. Decreases
  • C. Remains constant
  • D. Increases until a threshold frequency is reached
Q. What is the effect of increasing the intensity of light on the energy of emitted electrons in the photoelectric effect?
  • A. It increases the energy
  • B. It decreases the energy
  • C. It does not affect the energy
  • D. It can either increase or decrease the energy
Q. What is the effect of increasing the intensity of light on the energy of emitted photoelectrons?
  • A. Increases energy
  • B. Decreases energy
  • C. No effect on energy
  • D. Energy becomes negative
Q. What is the effect of increasing the intensity of light on the maximum kinetic energy of emitted electrons?
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes zero
Q. What is the effect of increasing the intensity of light on the maximum kinetic energy of the emitted electrons?
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes zero
Q. What is the effect of increasing the transmission power in a communication system?
  • A. Increased range
  • B. Decreased noise
  • C. Higher bandwidth
  • D. Lower distortion
Q. What is the effect of increasing the wavelength of incident light on the photoelectric current?
  • A. It increases the current
  • B. It decreases the current
  • C. It has no effect
  • D. It stops the current
Q. What is the effect of increasing the wavelength of incident light on the photoelectric effect?
  • A. More electrons are emitted
  • B. Fewer electrons are emitted
  • C. The kinetic energy of emitted electrons increases
  • D. The work function decreases
Q. What is the effect of increasing the work function of a metal on the photoelectric effect?
  • A. More electrons are emitted
  • B. Fewer electrons are emitted
  • C. The frequency of light must be increased
  • D. Both B and C are correct
Q. What is the electron configuration of the element with atomic number 26?
  • A. 1s2 2s2 2p6 3s2 3p6 4s2 3d6
  • B. 1s2 2s2 2p6 3s2 3p6 4s2 3d5
  • C. 1s2 2s2 2p6 3s2 3p6 4s2 3d7
  • D. 1s2 2s2 2p6 3s2 3p6 4s2 3d8
Q. What is the energy band gap of silicon at room temperature?
  • A. 0.1 eV
  • B. 1.1 eV
  • C. 1.5 eV
  • D. 2.0 eV
Q. What is the energy difference between the n=1 and n=2 levels in a hydrogen atom?
  • A. 10.2 eV
  • B. 13.6 eV
  • C. 1.89 eV
  • D. 3.4 eV
Showing 91 to 120 of 321 (11 Pages)

Modern Physics MCQ & Objective Questions

Modern Physics is a crucial subject in the curriculum of Indian students, especially for those preparing for school exams and competitive tests. Understanding the principles of Modern Physics not only enhances conceptual clarity but also plays a significant role in scoring better. Practicing MCQs and objective questions helps students identify important questions and solidify their knowledge, making exam preparation more effective.

What You Will Practise Here

  • Photoelectric Effect and its applications
  • Quantum Theory and its implications
  • Nuclear Physics: Fission and Fusion processes
  • Relativity: Concepts of time dilation and length contraction
  • Wave-Particle Duality and its significance
  • Atomic Models: Bohr's model and Quantum Mechanical model
  • Important formulas related to energy, momentum, and mass-energy equivalence

Exam Relevance

Modern Physics is a significant part of the syllabus for CBSE, State Boards, NEET, and JEE. Questions from this topic often appear in various formats, including multiple-choice questions, numerical problems, and theoretical explanations. Common question patterns include conceptual applications of theories, derivations of formulas, and problem-solving based on real-world scenarios. Mastering this subject can greatly enhance your performance in these competitive exams.

Common Mistakes Students Make

  • Confusing the concepts of classical and modern physics
  • Misunderstanding the implications of the photoelectric effect
  • Overlooking the significance of units and dimensions in calculations
  • Neglecting to apply the principles of relativity correctly in problems
  • Failing to connect theoretical concepts with practical applications

FAQs

Question: What are some important Modern Physics MCQ questions I should focus on?
Answer: Focus on topics like the photoelectric effect, nuclear reactions, and the principles of relativity, as these are frequently tested in exams.

Question: How can I improve my understanding of Modern Physics concepts?
Answer: Regular practice of objective questions and solving previous years' papers can significantly enhance your understanding and retention of key concepts.

Start your journey towards mastering Modern Physics today! Solve practice MCQs to test your understanding and boost your confidence for upcoming exams. Remember, consistent practice is the key to success!

Soulshift Feedback ×

On a scale of 0–10, how likely are you to recommend The Soulshift Academy?

Not likely Very likely
Home Practice Performance eBooks