Question

An air bubble in sphere having 4 cm diameter appears 1 cm from surface nearest to eye when looked along diameter. If amg = 1.5, the distance of bubble from refracting surface is

(a) 1.2 cm

(b) 3.2 cm

(c) 2.8 cm

(d) 1.6 cm

Answer

(a) 1.2 cm

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Suppose the pressure at the surface of mercury in a barometer tube is P1 and the pressure at the surface of mercury in the cup is P2,
  1. P1 = 0, P2 = atmospheric pressure.
  2. P1 = atmospheric pressure P2 = 0
  3. P1 = P2 = atmospheric pressure.
  4. P1 = P2 = 0
An electron with kinetic energy 5eV is incident on a hydrogen atom in its ground state. The collision:
  1. Must be elastic.
  2. May be partially elastic.
  3. Must be completely inelastic.
  4. May be completely inelastic.
Three capacitors each of capacity $ 4μ\text{F}$ are to be connected in such a way that the effective capacitance is $6μ\text{F}$. This can be done by:
Figure shows the transfer characteristics of a base biased CE transistor. Which of the following statements are true?

A deuteron of kinetic energy 50 keV is describing a circular orbit of radius 0.5 metre in a plane perpendicular to the magnetic field B. The kinetic energy of the proton that describes a circular orbit of radius 0.5 metre in the same plane with the same B is:
Which among the following has weak temperature dependence values with resistivity?

ABC is an equilateral triangle. Charges + q are placed at each corner. The electric intensity at O will be

(a)  

(b)

(c) Zero

(d)

In a Young’s double slit experiment, the separation of the two slits is doubled. To keep the same spacing of fringes, the distance D of the screen from the slits should be made

(a)  

(b)   

(c) 2D

(d) 4D

The focal length of the objective of a compound microscope if fo and its distance from the eyepiece is L. The object is placed at a distance u from the objective. For proper working of the instrument:

Power factor of LCR circuit in resonance is: