电感元件两端的电压和电流分别为u(t)、i(t),则其伏安关系为( )。
A: u(t) = pLi(t)
B: u(t) = i(t)/(pL)
C: u(t) = Li(t)/p
D: u(t) = pi(t)/L
A: u(t) = pLi(t)
B: u(t) = i(t)/(pL)
C: u(t) = Li(t)/p
D: u(t) = pi(t)/L
举一反三
- 当电感元件在某时刻t的电流i(t)=0时,电感元件两端的电压u(t)不一定为零;同样,当u(t)=0时,i(t)不一定为零
- 若载波uC(t)=UCcosωCt,调制信号uΩ(t)=UΩcosΩt,则调相波的表达式为() A: u(t)=Ucos(ωt+msinΩt) B: u(t)=Ucos(ωt+mcosΩt) C: u(t)=U(1+mcosΩt)cosωt D: u(t)=kUUcosωtcosΩt
- 已知流过电感的电流i=10cos(t)(A),电感L=0.001H,求电感两端的电压u。 A: 0.010cos(t)(V) B: -0.010cos(t)(V) C: 0.010sin(t)(V) D: -0.010sin(t)(V)
- 【单选题】f(t)=u(t)-u(t-1),那么f(t)*f(t)=()。 A. t[u(t)-u(t-1)]-(t-2)[u(t-1)-u(t-2)]; B. u(t)t-(t-2) [u(t-1)-u(t-2)]; C. t[u(t)-u(t-1)]- [u(t-1)-u(t-2)]; D. [u(t)-u(t-1)]- [u(t-1)-u(t-2)].
- u (5-t) u (t)= : A: u (t)- u (t-5) B: u (t) C: u (t)- u (5-t) D: u (5-t)