Q. What is the relative permeability of iron?

View solution

Q. The heat treatment of alnico alloys at _____ results in phase separation.

View solution

Q. What is the hysteresis loss of permalloy?

View solution

Q. Which of the following is a property of a hard magnetic material?

View solution

Q. A _____ cooling rate solidifies metallic glass made from iron- base alloys.

View solution

Q. Which of the following is not a use of magnesium-manganese ferrites?

View solution

Q. Yttrium-iron-garnet is used as microwave isolators in the ____ range.

View solution

Q. What is the coercive force of high carbon steel?

View solution

Q. What is the value of residual induction of alnico alloys?

View solution

Q. Which of the following is a requirement for thermal insulation in materials?

View solution

Q. How does moisture affect the thermal insulation of a body?

View solution

Q. Which of the following is an example of organic insulating material?

View solution

Q. An insulating material named 85% magnesia can be used up to temperatures of _______

View solution

Q. An insulating material made from ______ is preferred for applications where vibration resistance is vital.

View solution

Q. A cork insulation with a waterproof binder is used for _______ surfaces.

View solution

Q. Which of the following is a cause for an increase in insulation?

View solution

Q. An electrically insulating material has a resistivity that is ____ times greater than that of copper.

View solution

Q. The resistance of an insulating material ______ as the temperature increases.

View solution

Q. Ionic conductivity of a material can be increased by _______

View solution

Q. Cork has a low thermal conductivity of _____ W/m K.

View solution