For normal adjustment, length of astronomical telescope is______________?

Related Mcqs:

1. Magnification of the astronomical telescope is_____________?

   A. fo+fe
   B. fo/fe
   C. fe/fo
   D. (1+fo/fe)L/fo

2. Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?

   A. zero
   B. focus
   C. 2 f
   D. f/2

3. 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_____________?

   A. f2 + f1
   B. f2 – f1
   C. f1f2/f2+f1
   D. f1f2/f1-f2

4. The normal blood pressure range for a human body is______________?

   A. 120 to 80 torr
   B. 100 to 80 torr
   C. 120 to 60 torr
   D. 60 to 140 torr

5. A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is_________________?

   A. FE
   B. (FE)
   C. FE2/L
   D. FE2

6. A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber ?

   A. 2×108 Nm-2
   B. 5×106 Nm-2
   C. 0.5×10-6 Nm-2
   D. 0.2×10-6Nm-2

7. A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is____________________?

   A. (F1+F2) (121+122)
   B. (F1+F2) (122-112)
   C. (F1+F2) (12-11)
   D. (F1+F2) (12-11)

8. The least distance of distinct vision for a normal eye is_______________?

   A. 15 cm
   B. 25 cm
   C. 30 cm
   D. 40 cm

9. Dioptre power of an concave lens of 10 cm focal length is_______________?

   A. 10 dioptre
   B. 10 dioptre
   C. 1 / 10 dioptre
   D. 1 / 10 dioptre

10. Normal human body temperature 98.6°F corresponds to______________?

    A. 37°C
    B. 42°C
    C. 55°C
    D. 410°C