Engineering Services Exam- Electronics & Telecommunication Engineering Set 3

A transformer core is wound with a coil carrying an alternating current at a frequency of 50 Hz. The magnetization is uniform throughout the core volume of 0.01m3, the hysteresis loop has an area of 60,000 units when the axes are drawn in units of 10

The detailed information regarding the mechanism of fracture is available from microscopic examination, normally using scanning electron microscopy, and its study is termed as

Which one of the following is commonly used piezolectric ceramics?

Ceramic materials are

Which of the following point are important on the viscosity scale in the fabrication and processing of glasses?
1. Softening point
2. Working point
3. Melting point

A circular dislocation loop has edge character all round the loop and this dislocation can glide only on a surface that contains

Which of the following materials are used for high-technology applications?
1. Semi conductors
2. Bio materials
3. Smart materials

Which of the following are the activematerials of a lead acid cell?
1. Lead peroxide (PbO2) for positive plate
2. Sponge lead (Pb) for negative plate
3. Concentrated sulphuric acid (H2SO4)as electrolyte
4. Dilute Sulphuric acid (H2SO4) as electrolyte

The value of total potential difference created between the electodes, when the cell is not connected to an external circuit is known as its