SSC MTS EXAM

Detailed explanation-1: -This is the static buildup created when friction occurs between two objects. The principle behind this occurrence of static electricity is the same as that for contact static buildup.

Detailed explanation-2: -The spark is static electricity, a buildup of charged electrons. Electrons are a part of all atoms, the building blocks of all stuff, including you and me. All electrons have a negative charge. Negatively charged electrons push away from other negatively charged electrons.