Physics Past Questions and Answers

I. for current amplification.<br/>II. for voltage stabilization. <br/>III. for power amplification.<br/>IV. as a switch.<br/>which of the above are the uses of transistor?

The dimension of electromotive force are `

The resultant of two forces 12N and 5N is 13N. What is the angle between the two forces?

A force F required to keep a 5 kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms<sup style='font-size: smaller;'>-1</sup>. What is the speed, if the force is tripled?

A body of mass 4 kg resting on a smooth horizontal plane is simultaneously acted upon by two perpendicular forces 6N and 8N. Calculate the acceleration of the motion