1. I am not sure how US consulate would know he is your husband, he filled in yours in his application?
2. if asked, you could say "we are seperated, no idea how he is doing", the officer may treat your case as a single person if you have evidence to prove it.
3. If you have to fill your husband's visa type in the application, better have strong evidence that you two are seperated, otherwise the officer wouldn't believe that you will stay in Canada, not try to move with your husband.
4. You may apply for H4 in worst scenario.
2. if asked, you could say "we are seperated, no idea how he is doing", the officer may treat your case as a single person if you have evidence to prove it.
3. If you have to fill your husband's visa type in the application, better have strong evidence that you two are seperated, otherwise the officer wouldn't believe that you will stay in Canada, not try to move with your husband.
4. You may apply for H4 in worst scenario.