Modern Physics

Q. What is the minimum energy required to remove an electron from the surface of a metal called?
  • A. Work function
  • B. Ionization energy
  • C. Binding energy
  • D. Threshold energy
Q. What is the minimum frequency of light required to eject electrons from a metal surface in the photoelectric effect?
  • A. It depends on the intensity of light
  • B. It is constant for all metals
  • C. It depends on the work function of the metal
  • D. It is equal to the energy of the incident photons
Q. What is the Nyquist rate for a signal with a maximum frequency of 1 kHz? (2000)
  • A. 1 kHz
  • B. 2 kHz
  • C. 500 Hz
  • D. 4 kHz
Q. What is the Nyquist rate for a signal with a maximum frequency of 5 kHz?
  • A. 5 kHz
  • B. 10 kHz
  • C. 15 kHz
  • D. 20 kHz
Q. What is the Nyquist rate in a communication system?
  • A. The minimum sampling rate to avoid aliasing
  • B. The maximum data rate achievable
  • C. The frequency of the carrier wave
  • D. The bandwidth of the communication channel
Q. What is the Nyquist rate in communication systems?
  • A. The minimum sampling rate to avoid aliasing
  • B. The maximum frequency of the signal
  • C. The bandwidth of the communication channel
  • D. The maximum data rate of a channel
Q. What is the Nyquist rate in the context of signal sampling?
  • A. The minimum sampling rate to avoid aliasing
  • B. The maximum frequency of the signal
  • C. The bandwidth of the signal
  • D. The average power of the signal
Q. What is the Nyquist rate?
  • A. The minimum sampling rate to avoid aliasing
  • B. The maximum frequency of a signal
  • C. The bandwidth of a communication channel
  • D. The rate of data transmission in a channel
Q. What is the output of a NAND gate when both inputs are high?
  • A. 0
  • B. 1
  • C. Undefined
  • D. Depends on the circuit
Q. What is the output of a NAND gate when both inputs are true?
  • A. True
  • B. False
  • C. Undefined
  • D. Depends on the circuit
Q. What is the output of a NOR gate when both inputs are false?
  • A. True
  • B. False
  • C. Both true
  • D. Both false
Q. What is the output of a NOR gate when both inputs are low?
  • A. 0
  • B. 1
  • C. Undefined
  • D. Depends on the circuit
Q. What is the output of a NOT gate when the input is 0?
  • A. 0
  • B. 1
  • C. Undefined
  • D. Depends on the circuit
Q. What is the output of a NOT gate when the input is true?
  • A. True
  • B. False
  • C. Both True and False
  • D. Undefined
Q. What is the output of an AND gate with inputs 0 and 1?
  • A. 0
  • B. 1
  • C. 2
  • D. 3
Q. What is the output of an AND gate with inputs A = 0 and B = 0?
  • A. 0
  • B. 1
  • C. 2
  • D. Undefined
Q. What is the output of an AND gate with inputs A = 0 and B = 1?
  • A. 0
  • B. 1
  • C. 2
  • D. Undefined
Q. What is the output of an OR gate if one input is false and the other is true?
  • A. True
  • B. False
  • C. Both True
  • D. Both False
Q. What is the output of an OR gate when both inputs are low?
  • A. 0
  • B. 1
  • C. 2
  • D. Undefined
Q. What is the output of an XOR gate when both inputs are the same?
  • A. True
  • B. False
  • C. Both True and False
  • D. Undefined
Q. What is the output of the expression NOT (A AND B) when A = 0 and B = 1?
  • A. 0
  • B. 1
  • C. 2
  • D. Undefined
Q. What is the phenomenon called when an electron transitions from a higher energy level to a lower energy level in an atom?
  • A. Ionization
  • B. Excitation
  • C. Emission
  • D. Absorption
Q. What is the phenomenon called when electrons are emitted from a metal surface when it is exposed to light?
  • A. Photoelectric effect
  • B. Compton effect
  • C. Rayleigh scattering
  • D. Black body radiation
Q. What is the photoelectric effect primarily used for in technology?
  • A. Solar panels
  • B. LEDs
  • C. Lasers
  • D. Television screens
Q. What is the primary advantage of using digital signals over analog signals in communication systems?
  • A. Higher bandwidth
  • B. Less susceptibility to noise
  • C. Easier to modulate
  • D. Lower power consumption
Q. What is the primary application of nuclear fusion in stars?
  • A. Energy production
  • B. Nuclear weapons
  • C. Radioactive dating
  • D. Medical imaging
Q. What is the primary charge carrier in n-type semiconductors?
  • A. Holes
  • B. Electrons
  • C. Protons
  • D. Neutrons
Q. What is the primary charge carrier in P-type semiconductors?
  • A. Electrons
  • B. Holes
  • C. Protons
  • D. Neutrons
Q. What is the primary force that holds the nucleus of an atom together?
  • A. Electromagnetic force
  • B. Gravitational force
  • C. Strong nuclear force
  • D. Weak nuclear force
Q. What is the primary force that holds the nucleus together?
  • A. Electromagnetic force
  • B. Gravitational force
  • C. Strong nuclear force
  • D. Weak nuclear force
Showing 151 to 180 of 321 (11 Pages)
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