某三相电源的电动势分别为e
=20sin(314t+16°)V，e
=20sin(314t-104°)，e
=20sin(314t+136°)V，当t=13s时，该三相电动势之和为( )V。
=20sin(314t+16°)V，e=20sin(314t-104°)，e=20sin(314t+136°)V，当t=13s时，该三相电动势之和为( )V。 - A. 20
- B. 20／
- C. 0
- D. 20
]
=20sin(314t+16°)V，e=20sin(314t-104°)，e=20sin(314t+136°)V，当t=13s时，该三相电动势之和为( )V。 ]