A) A coil connected to a 250-V, 50-Hz sinusoidal supply takes a current of 10 A at a
phase angle of 30°. Calculate the resistance and inductance of, and the power
taken by the coil.
b) A voltage v = 0.95 sin754t is applied to a series RLC circuit, which has L = 22.0
mH, R = 23.2 k2, and C = 0.30 uF.
(i) What is the impedance and phase angle7 element?

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.