Quantum Mechanics
34 previous year questions.
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Chapter Questions 34 MCQs

Consider two blocks A and B of masses kg and kg that are placed on a frictionless table. The block A moves with a constant speed m/s towards the block B kept at rest. A spring with spring constant N/m is attached with the block B as shown in the figure. After the collision, suppose that the blocks A and B, along with the spring in constant compression state, move together, then the compression in the spring is, (Neglect the mass of the spring)
Find magnitude of acceleration of particle at . If velocity–time graph is given as shown in figure. 

Two strings with lengths and , and Young's moduli and are elongated under two weights as shown. Find the ratio .
Case (1): String has Young's modulus , length , cross–sectional area and a mass is attached.
Case (2): String has Young's modulus , length , cross–sectional area and a mass is attached.
Consider a ring of radius which rotates about a horizontal axis as shown (axis is tangent to the ring). Find the time period of small oscillations.
If the rolling object reaches a maximum height , what may be the object? 
Friction is sufficient so that the block does not slide. Find the work done by friction in sec. 


Identical capacitor is touched with this capacitor. If change in total energy is α × 10^-7 J then find α = ?
(Combined capacitance = 200 pF)
As shown in the figure, the ratio of and is 
Find ratio of potential energy of a body at point A to point B for the figure shown. 
Find the ratio of and for the system shown.
Upper wire has cross-section area and lower wire has area . Find the maximum mass of the pan that can be connected without breaking any wire. Given breaking stress of wire is . 
Find time taken by the block to slide a distance with respect to the wedge (in seconds). All surfaces are smooth. 
