已知,交流电压U1=10sin100πtV,U2=10sin(100πt-60°)V,则u=u1-u2的解析式为()
举一反三
- 已知,交流电压u1=10sin100πtV,u2=10sin(100πt-60°)V。则u=u1-u2的解析式为()。 A: u=10sin(100πt+60°)V B: u=10sin(100πt-60°)V C: u=8sin(100πt+30°)V D: u=8sin(100πt-30°)V
- 已知,交流电压U1=10sin100πtV,U2=10sin(100πt-60°)V,则u=u1-u2的解析式为() A: U=10sin(100πt+60°)V B: U=10sin(100πt-60°)V C: U=8sin(100πt+30°)V D: U=8sin(100πt-30°)V
- 已知,交流电压U1=10sin10003c0tV,U2=10sin(10003c0t-6000b0)V,则u=u1-u2的解析式为()
- 三个交流电压的解析式分别为 u 1 = 20sin(100 t + π / 6)V , u 2 = 30sin(100 t + 90 ° )V , u 3 = 50sin(100 t + 2 π / 3)V 。下列答案中正确的是 ( )
- 已知某正弦电压的频率f = 50Hz,初相角j=30°,在 t = 0.02 s时瞬时值u(0.02) = 100 V,则其瞬时值表达式可为( )。 A: u = 100 sin( 50t+30° ) V B: u = 141.4 sin( 50pt+30° ) V C: u = 200 sin( 100pt+30° ) V D: u = 282.8 sin( 100pt+30° ) V E: u = 282.8 sin( 50pt+30° ) V