Length, mass, time, intensity of light and amount of substance are examples of ____________?

Related Mcqs:

1. In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?

   A. Becomes double
   B. Remains same
   C. Becomes half
   D. First increases then decrease because of the curvilinear graph

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

3. 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

4. If a material object moves with speed of light its mass becomes ________________?

   A. equal to its rest mass
   B. double of its rest mass
   C. infinite
   D. zero

5. 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

6. 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)

7. 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

8. Intensity level of threshold of pain is: _____________?

   A. 60 db
   B. 80 db
   C. 100 db
   D. 120 db

   Submitted by: Rizwan Ayub Saadi

9. We prefer mercury as a thermometric substance because______________?

   A. Over a wide range of temperature its expansion is uniform
   B. It does not stick to thermometer glass
   C. It opaque to light
   D. All of above

10. If electrical conductivity increases with the increase of temperature of a substance, then it is a:

    A. Semiconductor
    B. Conductor
    C. Insulator
    D. None of the above

    Submitted by: Naveed Tahir