17. Magnetic fields are produced by (A) constant electric currents (B) electric currents that vary sinusoidally with time (C) time-varying electric fields (D) all of the above (E) only ( A ) and ( B ) above

9. TVγ-1 is constant for an ideal gas undergoing an adiabatic process, where γ is the ratio of heat capacities CP/CV. This is a direct consequence of (A) the zeroth law of thermodynamics alone (B) the zeroth law and the ideal gas equation of state (C) the first law of thermodynamics alone (D) the ideal gas equation of state alone (E) the first law and the ideal gas equation of state

17. Magnetic fields are produced by
(A) constant electric currents
(B) electric currents that vary sinusoidally with time
(C) time-varying electric fields
(D) all of the above
(E) only ( A ) and ( B ) above

相關試題

相關試卷