Explain how magnetism is created in a coil of wire
What will be an ideal response?
When current flows through a coil of wire, flux lines are created which creates a magnetic field. As current is increased, the magnetic field becomes stronger.
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An adhesive compatible with the board substrate should be used to hold the wire, and should be placed at each ____________________ and every inch (25.4 mm)for the entire length of the modification wire.
Fill in the blank(s) with the appropriate word(s).
What is Total Quality Management?
What will be an ideal response?
Heat treatment is common in processing of semiconductor material. A 200-mm-diameter silicon wafer with thickness of 725 µm is being heat treated in a vacuum chamber by infrared heat. The surrounding walls of the chamber have a uniform temperature of 310 K. The infrared heater provides an incident radiation flux of 200?kW/m2 on the upper surface of the wafer, and the emissivity and absorptivity of the wafer surface are 0.70. Using a pyrometer, the lower surface temperature of the wafer is measured to be 1000 K. Assuming there is no radiation exchange between the lower surface of the wafer and the surroundings, determine the upper surface temperature of the wafer. (Note: A pyrometer is a noncontacting device that intercepts and measures thermal radiation. This device can be used to
determine the temperature of an object’s surface.)
A tree is a common natural path for what type of electrical hazard?