2. In an AC circuit, only a resistor of resistance 15
2 is present. If voltage applied is V = 150 sin(50t)
volt then rms current is [NCERT Pg. 235]
(1) 52 A
(2) 5 A
(3) 10 A
(4) 10V2 A

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During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?