A. fo + fe
B. fo – fe
C. fo / fe
D. fe / fo
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Related Mcqs:
- Magnification of the astronomical telescope is_____________?
A. fo+fe
B. fo/fe
C. fe/fo
D. (1+fo/fe)L/fo - 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 - 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 - 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 - 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 - 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 - 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) - The least distance of distinct vision for a normal eye is_______________?
A. 15 cm
B. 25 cm
C. 30 cm
D. 40 cm - 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 - Normal human body temperature 98.6°F corresponds to______________?
A. 37°C
B. 42°C
C. 55°C
D. 410°C
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