3.3 A core-type transformer has a mean length of 0.6 m and a cross-section of 0.005 m2. The core is made of silicon sheet steel and has primary and secondary windings with 150 and 450 turns, respectively. The source voltage is 200 V-rms at 60 Hz. On open circuit, estimate the exciting current, (a) when the 150-turn winding is placed across the source, 450-turn winding across the load. (b) when the 450-turn winding is placed across the source, 150-turn winding across the load.

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?