☰ Contents · Physics

Short circuit and safety

Lessons 38–39 · 2 lessons · P.Q. Habibullayev, A. Boydedayev, A.D. Bahromov, J.E. Usarov, K.T. Suyarov, M.K. Yuldasheva. Physics, textbook for Grade 8 of general secondary schools, revised and enlarged 3rd edition. “O‘qituvchi” Publishing and Printing Creative House, Tashkent, 2019
Answers are for parents and teachers.
1
R_l = 0.4 Ω, I = 25 A. The voltage drop in V?
2
What is the power loss in that line, in W?
3
Power 20 kW, voltage 2000 V. The current in A?
4
Write two causes of a short circuit.
5
Write 3 rules of electrical safety you know.