linear expansion occurs in_________?

Related Mcqs:

1. The unit of coefficient of linear expansion or volume expansion is__________?

   A. K
   B. K-1
   C. K -2
   D. none

   Submitted by: Mahrukh

2. The co efficient of linear expansion is equal to__________?

   A. ΔL = αLΔT
   B. ΔL/LΔT
   C. LΔT/ΔL
   D. αLΔT-ΔL

   Submitted by: Mahrukh

3. The direction of the linear velocity of a body moving in a circle is______________?

   A. along the axis of rotation
   B. along the tangent
   C. directed towards the centre
   D. directed away from the centre

4. hen a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________?

   WA. 180°
   B. 0°
   C. 90°
   D. 45°

5. The relation between linear and angular acceleration is______________?

   A. a = a x r
   B. a = r x a
   C. a = a x r
   D. r = a x a

6. When a body moves in a circle of radius r with linear speed V its centripetal force is_______________?

   A. mV/r2
   B. mV/r
   C. mV2/r
   D. mV2/r2

7. When a wheel 1 m in diameter makes 30 rev min the linear speed of the point on its rim in ms-1 is_______________?

   A. 2π
   B. π/2
   C. π
   D. 20π

8. Linear momentum of a photon is_______________?

   A. zero
   B. hv/c2
   C. hv/c
   D. c2/hv

9. The linear momentum of an X-ray photon of wavelength 0.1A is_______________?

   A. 6.625x1023N-s
   B. 66.25x1023N-s
   C. 662.5x1023N-s
   D. data is insufficient

10. Laminar flow usually occurs at speeds_____________?

    A. Low
    B. High
    C. Very high
    D. Some time high and some time low