3 sentences

1. 电磁感应是发电机工作的基本原理。

   diàn​cí gǎn​yìng shì fā​diàn​jī gōng​zuò de jī​běn yuán​lǐ.

   Electromagnetic induction is the basic principle behind how generators work.

   Source: Dong Chinese Dictionary

2. 雷达通过发射电磁脉冲来探测目标。

   léi​dá tōng​guò fā​shè diàn​cí mài​chōng lái tàn​cè mù​biāo.

   Radar detects targets by emitting electromagnetic pulses.

   Source: Dong Chinese Dictionary

3. 这种电子设备容易受到外界电磁信号的干扰。

   zhè zhǒng diàn​zǐ shè​bèi róng​yì shòu​dào wài​jiè diàn​cí xìn​hào de gān​rǎo.

   This electronic equipment is susceptible to interference from external electromagnetic signals.

   Source: Dong Chinese Dictionary