PEQ Two particles A and B, move with constant velocities v1 and v2 respectively. At the initial moment, their position vectors are r1 and r2 respectively. The condition for particles A and B for their collision will be 1. r 1 − r 2 | r 1 − r 2 | = v 2 − v 1 | v 2 − v 1 | r1-r2r1-r2=v2-v1v2-v1 2. r 1 ⋅ v 1 = r 2 ⋅ v 2 r1·v1=r2·v2 3. r 1 × v 1 = r 2 × v 2 r1×v1=r2×v2 4. r 1 − r 2 = v 1 − v 2 r1-r2=v1-v2 Ruhul Amin Alig
PPYQ A particle shows the distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point: Ruhul Amin Alig
PEQ The given graph represents V-I characteristic for a semiconductor device. Which of the following statement is correct? 313039 expand A It is V-I characteristic for solar cell where, point A represents open circuit voltage and point B short circuit current. B It is for a solar cell and points A and B represent open circuit voltage and current, respectively. C It is for a photodiode and points A and B represent open circuit voltage and current respectively. D It is for a LED and points A and B represent open circuit voltage and short circuit current, respectively. Ruhul Amin Alig
