A central force is that which__________________?

Related Mcqs:

1. A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes up to 2 in height further, find the magnitude of the force. Consider g = 10m/s 2

   A. 22N
   B. 16N
   C. 20N
   D. 4N

   Submitted by: Huzaifa Naseer

2. Coercive force is the force which opposes ____________________?

   A. Demagnetization
   B. Breakage
   C. Extension
   D. Surface cracking

3. Two identical metal balls with charges + 2Q and – Q are separated by some distance, and exert a force F on each other. They are joined by a conducting wire, which is then removed. The force between them will now be_________?

   A. F
   B. F/2
   C. F/4
   D. F/8

   Submitted by: Tauseef Ali

4. In the shadow of a ball the central portion appears bright that happens due to_________________?

   A. Interference
   B. Diffraction
   C. Polarization
   D. Refraction

5. Central spot of Newtons rings __________________?

   A. bright
   B. dark for large wavelength
   C. dark
   D. bright for large wavelength

6. Work done will be maximum if the angle between the force F and displacement d is______________________?

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

   Submitted by: admin

7. A uniform steel wire of length 4m and area of cross-section 3×10-6m2 is extended by 1mm by the application of a force. If the youngs modulus of steel is 2×1011 Nm-2 the energy stored in the wire is___________________?

   A. 0.025J
   B. 0.50J
   C. 0.75J
   D. 0.100J

8. The unit of force is _________ and its symbol is ______________ Which is the correct pair ?

   A. Newton, n
   B. Newton, N
   C. newton, n
   D. newton, N

9. 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

10. Gravitation force of sun is__________?

    A. 274 m/s²
    B. 362 m/s²
    C. 300 m/s²
    D. None  of these

    Submitted by: Adeeba Bashir