An ion engine has a 1-T magnetic field, and a hydrogen plasma is to be shot out at an \( E \times B \) velocity of 1000 km/sec. How much internal electric field must be present in the plasma?

An ion engine has a 1-T magnetic field, and a hydrogen plasma is to be shot out at an \( E \times B \) velocity of 1000 km/sec. How much internal electric field must be present in the plasma?

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