MCAT MCQ Quiz Hub

MCAT Physics Mcq Questions Optical instruments

Choose a topic to test your knowledge and improve your MCAT skills

1. A lens which converges a beam of parallel rays to a point is called




2. A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called




3. The diameter of a lens is called




4. In going form a denser to rarer medium a ray of light is




5. Unit of power of a lens is




6. Dioptre power of an concave lens of 10 cm focal length is




7. The power of a concave lens is




8. The minimum distance between an object and its real image in a convex lens is




9. If an object is placed away from 2f of a converging lens then the image will be




10. A convex lens gives a virtual image only when the objects lies




11. Magnifying power of simple microscope




12. Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is




13. The least distance of distinct vision for a normal eye is




14. Least distance of distinct vision




15. If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from




16. Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is




17. A convex lens of focal length f1 and a concave lens of focal length f2 are placed in contact. The focal length of the combination is




18. Final image produced by a compound microscope is




19. For normal adjustment, length of astronomical telescope is




20. In multimode step index fibre the refractive index of core and cladding is




21. Dispersional effect may produce error in light signals. This type of error




22. Light signals passes through multimode graded index fibre due to




23. Which one type of fibre is more suitable for transmission of signals in which white light is used ?




24. Critical angle is that incident angle in denser medium for which angle of refraction is




25. There is no noticeable boundary between core and cladding




26. The electrical signals change into light signals for transmission through optical fibre. A light pulse represent




27. A lens, which is thicker at the center and thinner at the edges is called




28. A spectrometer is used to find




29. If a convex lens of focal length f is cut into two identical halves along the lens diameter the focal length of each half is




30. A convex and concave lens of focal length f are in contact the focal length of the combinations will be




31. The value of critical angle for glass is




32. In optic fiber transmission system __________ are used regenerate the dim light signal.




33. Magnification of the astronomical telescope is




34. The equation ?min = 1.22 ?/D was devised by




35. A convex lens acts as a diverging lens if the




36. Michelson calculated the speed of light using the instruments




37. Michelson devised the formula to calculate the speed of light




38. The function of collimeter in spectrometer is




39. In optic fiber transmission the repeater are separated through a distance of ______ km in newer system.




40. Errors in the transmission of power through optic fiber can be minimized by using a




41. The current through a metallic conductor is due to the motion of




42. Resistance of a conductor depends upon




43. A wire having very high value of conductance is said to be




44. A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part




45. Production of heat due to an electric current flowing through a conductor is given by




46. When same current passes for same time through a thick and thin wire




47. Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f?




48. One kilowatt hour is the amount of energy delivered during




49. Thermocouples convert




50. How much heat does a 40 W bulb generates in one hour?