Practice Summary - 7.9 | 7. ALTERNATING CURRENT | CBSE 12 Physics Part 1
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skillsβ€”perfect for learners of all ages.

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the relationship between AC voltage and current in a resistor?

πŸ’‘ Hint: Think about how they behave over time.

Question 2

Easy

Define RMS voltage.

πŸ’‘ Hint: Consider the practical usage of AC in homes.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What happens to the current in an inductor when AC voltage is applied?

  • It leads the voltage
  • It lags the voltage
  • It is in phase with the voltage

πŸ’‘ Hint: Think about how inductors behave during AC operation.

Question 2

True or False: Transformers can only increase voltage.

  • True
  • False

πŸ’‘ Hint: Consider different scenarios of transformers.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Determine the impact of changing the frequency on an RLC circuit's current and power factor.

πŸ’‘ Hint: Analyze how each component's reactance depends on frequency.

Question 2

Design a transformer to convert 220V to 110V. If it has 200 turns in the primary, how many turns should be in the secondary?

πŸ’‘ Hint: Remember to set up the ratios correctly between voltages and turns.

Challenge and get performance evaluation