Major Competitive Exams

Q. In a diode, what is the region called where no current flows?
  • A. Forward bias
  • B. Reverse bias
  • C. Depletion region
  • D. Conduction region
Q. In a double convex lens, if the radii of curvature are 10 cm and 15 cm, what is the focal length using the lens maker's formula?
  • A. 6 cm
  • B. 10 cm
  • C. 12 cm
  • D. 8 cm
Q. In a double-slit experiment, if the distance between the screen and the slits is increased, what happens to the fringe separation?
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes zero
Q. In a double-slit experiment, if the distance between the slits is 0.2 mm and the distance to the screen is 1 m, what is the fringe width for light of wavelength 600 nm?
  • A. 0.3 mm
  • B. 0.6 mm
  • C. 0.9 mm
  • D. 1.2 mm
Q. In a double-slit experiment, if the distance between the slits is 0.5 mm and the wavelength of light is 400 nm, what is the distance between the first and second bright fringes?
  • A. 0.4 m
  • B. 0.8 m
  • C. 1.2 m
  • D. 1.6 m
Q. In a double-slit experiment, if the distance between the slits is 0.5 mm and the distance to the screen is 2 m, what is the distance between the first and second bright fringes if the wavelength of light used is 500 nm?
  • A. 0.5 cm
  • B. 1 cm
  • C. 1.5 cm
  • D. 2 cm
Q. In a double-slit experiment, if the distance between the slits is doubled while keeping the wavelength constant, what happens to the fringe width?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Quadruples
Q. In a double-slit experiment, if the distance between the slits is doubled, how does the fringe width change?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Quadruples
Q. In a double-slit experiment, if the distance between the slits is doubled, what happens to the fringe width?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Quadruples
Q. In a double-slit experiment, if the distance between the slits is doubled, what happens to the fringe separation on the screen?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. In a double-slit experiment, if the distance between the slits is halved, what happens to the fringe separation on the screen?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. In a double-slit experiment, if the distance between the slits is increased, what happens to the interference pattern?
  • A. Fringes become wider
  • B. Fringes become narrower
  • C. Fringes disappear
  • D. Fringes remain unchanged
Q. In a double-slit experiment, if the distance between the slits is increased, what happens to the number of visible fringes on the screen?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. In a double-slit experiment, if the distance to the screen is increased, what happens to the fringe pattern?
  • A. Fringe width decreases
  • B. Fringe width increases
  • C. Fringe pattern disappears
  • D. Fringe pattern becomes sharper
Q. In a double-slit experiment, if the distance to the screen is increased, what happens to the fringe separation?
  • A. Fringe separation decreases
  • B. Fringe separation increases
  • C. Fringe separation remains the same
  • D. Fringe separation becomes zero
Q. In a double-slit experiment, if the distance to the screen is increased, what happens to the interference pattern?
  • A. Fringe width decreases
  • B. Fringe width increases
  • C. Fringe pattern disappears
  • D. Fringe spacing remains unchanged
Q. In a double-slit experiment, if the intensity of light at the center of the fringe pattern is I0, what is the intensity at the first minimum?
  • A. 0
  • B. I0
  • C. I0/2
  • D. I0/4
Q. In a double-slit experiment, if the screen distance is increased, what happens to the fringe separation?
  • A. Fringe separation increases
  • B. Fringe separation decreases
  • C. Fringe separation remains the same
  • D. Fringe separation becomes zero
Q. In a double-slit experiment, if the screen is moved further away from the slits, what happens to the fringe pattern?
  • A. Fringes become wider
  • B. Fringes become narrower
  • C. Fringe intensity increases
  • D. Fringe intensity decreases
Q. In a double-slit experiment, if the screen is moved further away from the slits, what effect does this have on the fringe spacing?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. In a double-slit experiment, if the wavelength of light is 600 nm and the distance between the slits is 0.5 mm, what is the fringe width if the screen is 1 m away?
  • A. 0.12 mm
  • B. 0.3 mm
  • C. 0.6 mm
  • D. 0.5 mm
Q. In a double-slit experiment, if the wavelength of light is increased, what happens to the distance between the fringes?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. In a double-slit experiment, what happens to the interference pattern if the distance between the slits is increased?
  • A. Pattern becomes wider
  • B. Pattern becomes narrower
  • C. No change
  • D. Pattern disappears
Q. In a double-slit experiment, what is the effect of increasing the distance between the slits on the fringe width?
  • A. Fringe width increases
  • B. Fringe width decreases
  • C. Fringe width remains constant
  • D. Fringe width becomes zero
Q. In a dynamic equilibrium, which of the following statements is true?
  • A. The rates of the forward and reverse reactions are equal
  • B. The concentrations of reactants and products are equal
  • C. The reaction has stopped
  • D. The system is at rest
Q. In a family of 4 children, what is the probability that at least one is a girl given that there are at least 2 boys?
  • A. 1/2
  • B. 3/4
  • C. 1/4
  • D. 2/3
Q. In a family with 3 children, what is the probability that at least one child is a girl given that at least one child is a boy?
  • A. 0.75
  • B. 0.5
  • C. 0.25
  • D. 0.6
Q. In a first-order reaction, if the concentration of reactant decreases from 0.8 M to 0.2 M in 20 minutes, what is the rate constant? (2022)
  • A. 0.0347 min⁻¹
  • B. 0.0693 min⁻¹
  • C. 0.1 min⁻¹
  • D. 0.2 min⁻¹
Q. In a first-order reaction, if the concentration of the reactant is halved, what happens to the half-life?
  • A. It doubles
  • B. It remains the same
  • C. It is halved
  • D. It becomes zero
Q. In a first-order reaction, if the rate constant k is 0.03 min⁻¹, what is the time required for the concentration to decrease to half? (2020)
  • A. 23.1 min
  • B. 10.0 min
  • C. 20.0 min
  • D. 15.0 min
Showing 5071 to 5100 of 11933 (398 Pages)
Soulshift Feedback ×

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

Not likely Very likely