A cool easy problem 2

Electricity and Magnetism Level 2

A piece of wire of resistance 4 ohm is bent through 180˚ at its midpoint and the two halves are twisted togeher , then the resistance is 'x'. FIND 'x'

Excel in math and science

Master concepts by solving fun, challenging problems.

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A cool easy problem 2

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 5 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.