AC Circuits

Structure Type: Course
Code: ISTA0302
Type: Compulsory
Level: Bachelor
Credits: 2.0 points
Responsible Teacher: Koski, Jari
Teacher Team: Käräjämäki, Esa ; Koski, Jari ; Niemi, Henry ; Esala, Tapani ; Verkkonen, Vesa
Language of Instruction: Finnish

Course Implementations, Planned Year of Study and Semester

Curriculum  Semester  Credits  Start of Semester  End of Semester
I-ST-2010   1 spring   2.0   2011-01-05   2011-06-17  
I-ST-2011   1 spring   2.0   2012-01-09   2012-06-18  
I-ST-2012   1 spring   2.0   2013-01-05   2013-06-18  
I-ST-2013   1 spring   2.0        
ST-2014   1 spring   2.0        
ST-2015   1 spring   2.0        

Learning Outcomes

The student is introduced to induction phenomenon and the basics of AC theory and learns to solve basic problems on alternating currents.

Student's Workload

The total amount of student's work is 54 h, which contains 28 h of contact studies.

Prerequisites / Recommended Optional Courses

ISTP0201 Electrostatics and Electric Phenomena
ISTA0203 Direct Current Circuits
ISTP0301 Magnetism


Generation of AC power from mechanical energy. Principle of a transformer and generation of iron losses appearing in electric machines. Intstantaneous value, mean value and effective value. Describing sinusoidal AC power with a rotating indocator and with a effective value indicator.

Recommended or Required Reading

Heikki Esala: Teoreettinen Sähkötekniikka 1 (chapters 3-4 and formula collection) in pdf-format .

Mode of Delivery / Planned Learning Activities and Teaching Methods

The AC theory and it appliance in practice is first looked into during lectures. After this, the students independently apply the learnt skills by solving practical calculations and assignments. The solutions to the calculations and assignments are gone through during lessons.

Assessment Criteria

Grade 5: The student is able to apply creatively the contents of the course.

Grade 3: The student is well-abled to utilize the course contents.

Grade 1: The student knows those subjects of the course, which are necessary for the forthcoming studies and working life.

Assessment Methods

Exam and activity demonstrated in calculations and assignments.