Major Competitive Exams

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Q. What is the effect of increasing the wavelength of light in a diffraction pattern?
  • A. Fringe spacing decreases
  • B. Fringe spacing increases
  • C. No effect on fringe spacing
  • D. Fringe intensity increases
Q. What is the effect of increasing the wavelength of light in a double-slit diffraction experiment?
  • A. Fringe separation decreases
  • B. Fringe separation increases
  • C. No effect on fringe separation
  • D. Fringe visibility decreases
Q. What is the effect of increasing the wavelength of light in a double-slit experiment?
  • A. Fringe width decreases
  • B. Fringe width increases
  • C. Fringe separation remains unchanged
  • D. No effect on interference pattern
Q. What is the effect of increasing the wavelength of light in a double-slit experiment on the fringe separation?
  • A. Fringe separation decreases
  • B. Fringe separation increases
  • C. Fringe separation remains the same
  • D. Fringe separation becomes zero
Q. What is the effect of increasing the wavelength of light on the angle of refraction when it passes from air into glass? (2023)
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. What is the effect of increasing the wavelength of light on the diffraction pattern produced by a single slit?
  • A. The pattern becomes sharper
  • B. The pattern becomes broader
  • C. The pattern remains unchanged
  • D. The pattern disappears
Q. What is the effect of increasing the wavelength of light on the diffraction pattern? (2019)
  • A. Increases fringe width
  • B. Decreases fringe width
  • C. No effect
  • D. Increases intensity
Q. What is the effect of increasing the wavelength of light on the fringe separation in a double-slit experiment?
  • A. Increases
  • B. Decreases
  • C. No effect
  • D. Depends on slit separation
Q. What is the effect of increasing the wavelength of light used in a double-slit experiment on the fringe separation?
  • A. Fringe separation decreases
  • B. Fringe separation increases
  • C. Fringe separation remains the same
  • D. Fringe separation becomes zero
Q. What is the effect of increasing the wavelength on the diffraction pattern of a single slit?
  • A. Fringes become narrower
  • B. Fringes become wider
  • C. Fringes disappear
  • D. Fringes become brighter
Q. What is the effect of increasing the wavelength on the diffraction pattern?
  • A. Fringes become narrower
  • B. Fringes become wider
  • C. No effect
  • D. Fringes disappear
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 effect of inserting a dielectric material between the plates of a capacitor?
  • A. Increases capacitance
  • B. Decreases capacitance
  • C. No effect on capacitance
  • D. Changes the voltage across the plates
Q. What is the effect of introducing a dielectric material between the plates of a capacitor? (2019)
  • A. Increases capacitance
  • B. Decreases capacitance
  • C. No effect
  • D. Increases resistance
Q. What is the effect of magnesium deficiency in plants? (2022)
  • A. Stunted growth
  • B. Leaf curling
  • C. Chlorosis
  • D. Wilting
Q. What is the effect of multiplying a function by a negative constant on its graph?
  • A. It reflects the graph across the x-axis.
  • B. It reflects the graph across the y-axis.
  • C. It shifts the graph to the left.
  • D. It stretches the graph vertically.
Q. What is the effect of parathyroid hormone (PTH)? (2019)
  • A. Increase calcium levels in blood
  • B. Decrease calcium levels in blood
  • C. Increase phosphate levels
  • D. Decrease phosphate levels
Q. What is the effect of photoperiod on flowering in plants? (2020)
  • A. It has no effect
  • B. It determines the timing of flowering
  • C. It inhibits flowering
  • D. It promotes vegetative growth
Q. What is the effect of placing a ferromagnetic material in a magnetic field? (2023)
  • A. It becomes a magnet
  • B. It repels the magnetic field
  • C. It has no effect
  • D. It weakens the magnetic field
Q. What is the effect of placing a ferromagnetic material inside a solenoid? (2023)
  • A. Decreases the magnetic field
  • B. Increases the magnetic field
  • C. No effect
  • D. Reverses the magnetic field
Q. What is the effect of plastic pollution on marine life? (2022)
  • A. Increased fish populations
  • B. Habitat destruction
  • C. Bioaccumulation of toxins
  • D. Both b and c
Q. What is the effect of pressure on the viscosity of gases?
  • A. Increases viscosity
  • B. Decreases viscosity
  • C. No effect
  • D. Depends on temperature
Q. What is the effect of pressure on the viscosity of liquids?
  • A. Increases viscosity
  • B. Decreases viscosity
  • C. No effect
  • D. Depends on the temperature
Q. What is the effect of reversing the direction of current in a loop of wire on the magnetic field it produces? (2019)
  • A. The magnetic field disappears
  • B. The magnetic field direction reverses
  • C. The magnetic field strength increases
  • D. The magnetic field becomes weaker
Q. What is the effect of reversing the direction of current in a loop of wire on the magnetic field? (2019)
  • A. The magnetic field direction remains the same
  • B. The magnetic field direction reverses
  • C. The magnetic field strength increases
  • D. The magnetic field strength decreases
Q. What is the effect of reversing the direction of current in a loop on the magnetic field direction? (2019)
  • A. The magnetic field direction remains unchanged
  • B. The magnetic field direction reverses
  • C. The magnetic field disappears
  • D. The magnetic field becomes weaker
Q. What is the effect of reversing the direction of current in a wire on the magnetic field around it? (2019)
  • A. The magnetic field disappears
  • B. The magnetic field direction reverses
  • C. The magnetic field strength increases
  • D. The magnetic field strength decreases
Q. What is the effect of rotating a polarizer in front of a beam of polarized light?
  • A. The intensity increases
  • B. The intensity decreases
  • C. The intensity remains constant
  • D. The light changes color
Q. What is the effect of rotating a polarizer in front of a polarized light source?
  • A. Intensity remains constant
  • B. Intensity increases
  • C. Intensity decreases
  • D. Intensity first increases then decreases
Q. What is the effect of substituents on the reactivity of aromatic compounds in electrophilic substitution?
  • A. All substituents deactivate the ring.
  • B. Electron-donating groups activate the ring.
  • C. Electron-withdrawing groups have no effect.
  • D. All substituents direct to the meta position.
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