A proximity switch can be actuated a) without any physical contact. c) by a change in capacitance. b) by a change in light intensity. d) by all of the these     Figure 6-6 represents the symbol for a...

A proximity switch can be actuated a) without any physical contact. c) by a change in capacitance. b) by a change in light intensity. d) by all of the these

Figure 6-6 represents the symbol for a a) pressure switch. c) limit switch. b) temperature switch. d) level switch.

Figure 6-7 represents the symbol for a a) pressure switch. c) proximity switch. b) temperature switch. d) level switch.