57) The maximum value of a sine wave AC voltage is 10 V. What is its RMS value?

58) A capacitor of 4.7 micro Farade is connected to an AC of 230 V and a frequency of 50 Hz. What is the current (I) through capacitor?

59) A solenoid of 3 m length has 90 turns and takes 3.5 A. The field intensity is

60) "To every action there is always an equal and opposite reaction" is Newton's _____ law of motion.

61) If the thickness of plate is negligible when compared to diameter of the cylinder, then it is called