Given below are two statements:
Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges.
Statement II: Atoms of each element are stable and emit their characteristic spectrum.
In the light of the above statements, choose the most appropriate answer from the options given below.
A bob is whirled in a horizontal plane by means of a string with an initial speed of $$\omega \mathrm{~rpm}$$. The tension in the string is $$T$$. If speed becomes $$2 \omega$$ while keeping the same radius, the tension in the string becomes:
Consider the following statements A and B and identify the correct answer :
A. For a solar-cell, the I-V characteristics lies in the IV quadrant of the given graph.
B. In a reverse biased $$p n$$ junction diode, the current measured in $$(\mu \mathrm{A})$$, is due to majority charge carriers.
A thermodynamic system is taken through the cycle $$abcda$$. The work done by the gas along the path $$b c$$ is: