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Note: Could you please use trigonometry?
Earth in light years.
1. d) The average temperature of the interior of a sun-like star is of the order 10^8 K. Estimate
the mass of the star in terms of the solar mass if it has a radius of order 10^10 cm.
3. b) A supernova explosion takes place at the distance of 4 pc. If the absolute magnitude of
the supernova is −25, calculate its apparent magnitude. Will the supernova be brighter
than the Sun? Justify your answer.
b) Explain the ALT and CHOP modes of dual trace oscilloscope
and –12V when it is more than –4V.
b)Propose a circuit to obtain +10V dc regulated output using IC 7812.
+ -10V amplitude triangular wave signal at the output.
b)Design and draw a zener voltage regulator to provide 10V output if load resistance varies
between 50 Ω and 200Ω . Assume that the input unregulated dc voltage is 15V and
minimum zener operating current is 10 mA. Calculate the wattage of the Zener diode,
value and wattage of Rs