Physics
The energy of electron is 2.5 eV. When expressed in Joule, it is
- 1.6 x 10-19 J
- 4.0 x 10-19 J
- 3.2 x 10-19 J
- 0
Related Questions
1 Joule is equivalent to …………… erg
- 105
- 107
- 109
- 1
The S.I. unit of power is
- Watt
- Joule
- Nm
- Nms
A block of mass 20 kg is pulled up a slope as shown in the figure given below with a constant speed by applying a force of 200 N parallel to the slope from the initial position A to the final position B. Work done in moving the block from A to B is:
- 600 J
- 500 J
- 60 J
- 200 J
A force F acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of force.
(a) Write the expression for the work done by the force.
(b) What should be the angle between force and displacement so that the work done is (i) zero, (ii) maximum?