P. 4613. A uniform, 1-metre long uninsulated resistance wire, the cross section of which is everywhere constant, is connected to a power supply, the terminal voltage of which is stabilized. One terminal of a resistor, whose resistance is the same as the resistance wire is connected to the end of the resistance wire, whilst the other terminal is moved along the resistance wire.
Where is the pointer of the moving terminal, when the power dissipated on the resistor is one-quarterth of the maximum power dissipated at the resistor?
Deadline expired on 10 March 2014.