A. Only (i)
B. Only (ii)
C. Only (iii)
D. Both (i) and (ii)
Related Mcqs:
- The number of significant figures in the length of a bar 6200mm measured by meter rod is_______________?
A. 4
B. 3
C. 2
D. None of these - An observer shoots parallel to a meter stick at very high (relativistic) speed and finds that the length of meter stick is________________?
A. greater than one meter
B. less than one meter
C. one meter
D. a foolish question - 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 - Why the needle of iron swims on water surface when it is kept gently ?
A. It will remain under the water, when it will displace more water than its weight
B. the density of needle is less than that of water
C. due to surface tension
D. due to its shapeSubmitted by: Abid Hussain
- 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) - 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 - Venturi meter is used to measure_________________?
A. Fluid pressure
B. Fluid density
C. Fluid speed
D. None - The speed of the fluid is maximum in the venturi meter at_______________?
A. Convergent duct
B. Divergent duct
C. Throat
D. None of these
