Alarms do not provide ________
A) A strobe light version B) A flashing or steady LED lamp
C) Magnetic field outputs D) Continuous or pulsing sound outputs
C
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An op amp follower circuit is useful because
A. the output voltage is equal to the input voltage and the input current is very large B. the output voltage is the negative of the input voltage and the input current is very large C. the output is fixed (i.e., doesn't change) even when the input changes D. the output voltage is equal to the input voltage and the input current is almost zero E. the output voltage is the negative of the input voltage and the input current is almost zero
0.083 × 0.009 =
A) 0.747 B) 0.727 C) 0.000 747 D) 0.000 727
A device that converts a nonelectrical impulse such as sound, heat, light, or pressure into an electrical signal is called:
A) A sensor. B) A switch. C) An actuator. D) A sending unit.
When leaning an extension ladder upon a structure and the fly section rises above the top edge of the structure, the ladder must extend above the structure not less than ____, measured from the highest point of contact.
A. one foot B. two feet C. three feet D. six feet