The energy of an object due to its specific position or configuration is known as:
A. Kinetic Energy
B. Mechanical Energy
C. Thermal Energy
D. Potential Energy
Answer: Option D
Solution (By JKSSB Mock Tests)
Potential energy is the stored energy an object possesses due to its position relative to other objects, stresses within itself, its electric charge, or other factors. For example, water stored in a dam has gravitational potential energy, and a compressed spring has elastic potential energy.
Explanation:
Fuse needs low melting point to melt at overload, high resistance to generate more heat (I²R). Tin-lead alloy suitable. Copper high melting point, not fuse material.
Explanation:
Acceleration a = dv/dt = d(3t² + 2t)/dt = 6t + 2. At t = 2 s: a = 6(2) + 2 = 14 m/s². Differentiation of velocity gives instantaneous acceleration. Memory tip: a = dv/dt; for polynomial v(t), differentiate term by term. Tests calculus application in kinematics, common in advanced competitive exam questions.
Explanation:
When a wave (like light or sound) changes mediums, its velocity changes due to the new medium's optical or mechanical density. Wavelength changes proportionally with velocity (v = fλ). However, frequency is determined solely by the source generating the wave and the energy of the photons/particles, and it remains absolutely constant.
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