An infinite straight wire with radius r carries a current i uniformly distributed over its cross section. the magnetic field at a distance d from the axis of the wire is b. what is the magnetic field a distance 2d from the axis of the wire? both points are inside (2d < r) the wire.(a) both fields are zero.(b) b(c) b/2(d) 2b(e) b/4(f) 4b

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.