The rate of change of displacement is MCQ with Answer and Explanation

Explanation:
Resonance: ωL = 1/(ωC) ⇒ ω = 1/√(LC). At this frequency, impedance minimum (Z=R), current maximum. Memory tip: 'Resonance: X_L = X_C; series: Z_min, current max'. AC circuit concept frequently tested in competitive exams.

Explanation:
When a body is lifted against gravity, work done (mgh) is stored as gravitational potential energy. This energy can be recovered when the body falls. Kinetic energy relates to motion, thermal to heat, elastic to deformed materials. The conservation of energy principle states that work done against conservative forces becomes potential energy. Formula: PE = mgh, where h is height above reference. Memory aid: 'Potential' means stored energy due to position. This conceptual question tests energy transformation understanding, frequently appearing in work-energy theorem applications in competitive exams.

Explanation:
Refrigerant evaporates inside absorbing heat, compressed outside releasing heat, cycle repeats.