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Q. A 75-kVA transformer has an iron loss of 1 kW and a full-load copper loss of 1 kW. If the transformer operates on the following load cycle, determine the all-day efficiency:
8 hours full load at unity power factor
8 hours no load
8 hours one-half full load at unity power factor
detail note on non biased
Q. A current i(t) = 20 cos(2π × 60)t A flows through a wire. Find the charge flowing, and the number of electrons per second that are passing some point in the wire.
SHLD Store HL pair Direct Instruction This instruction is used to store the contents of HL register pair to memory address specified in the instruction and the next ad
Q. What is a heat sink? List the factors, which determine its efficiency. To reduce the chance of thermal runaway, the rise of temperature at the collector junction to a danger
Explain time division switching? Time Division Switching: A switching element can be shared by number of concurrently active speech circuits. It is the princi
One battery having of four cells, connected in series. Emf of each cell is 1.45V and internal resistance of 0.04Ω. if a load resistance of 5Ω is connected to the battery, draw the
Q. Can you explain twos Complement Division? 2's complement division is repeated 2's complement subtraction. The 2's complement of the divisor is calculated, and then added to
Responses to Exponential Excitations Let us consider Aest as a typical exponential excitation in which A is a constant and s is a complex- frequency variablewith a dimension of
Dielectric Heating Dielectric losses occur in insulating materials. These are same as hysteresis losses in magnetic materials. When an alternating electric field is a
Q. What are the performance measures of oscillator circuits? 1. Stability: This is determined by the passive components. R, C and L determine frequency of oscillations. If R ch
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