<p>The instantaneous value of an alternative voltage in volts is given by the expression&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>&#949;</mi><mi>t</mi></msub><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mn>140</mn><mo>&#160;</mo><mi>sin</mi><mo>&#160;</mo><mn>300</mn><mi>t</mi></math>&nbsp;where t is in second. What is (i) peak value of the voltage, (ii) its rms value and (iii) frequency of the supply?</p>