Physics
The adjacent diagram shows the movable block of a block and tackle system with effort in a convenient direction. From the diagram we can conclude that the number of pulleys used in the fixed block are …………… .
- 1
- 3
- 2
- 4
Related Questions
The kinetic energy of a given body depends on the :
- position
- centre of gravity of the body.
- momentum
- displacement
For burning of coal in a thermoelectric station, the energy conversion taking place is :
- chemical to heat to mechanical
- chemical to heat to mechanical to electrical
- chemical to heat to light
- heat to chemical to mechanical
White light is dispersed by a prism. Inside the prism, compared to the blue light, the red light
- slows down less and refracts more
- slows down more and refracts less
- slows down more and refracts more
- slows down less and refracts less
An endoscope uses optic fiber to transmit high resolution images of internal organs without loss of information. The principle of light that is used by the optic fiber is based on :
- refraction
- reflection
- scattering
- total internal reflection