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A current of 100 A flows in a conical copper with dimensions as shown in Fig 26.8. Find the current density and electric field intensity at the end faces of the conductor

An N-P-N transistor is connécted in common emitter contiguration in which collector supply is 9V and the voltage drop across the load resistance of 1000Omega connected in the collector circuit is 1V. If current amplification factor is (25/26), then the base current is

A house is fitted with seven tubelights of rating 220 V, 40 W each , two bulbs of rating 220 V, 60 W each, five fans each drawing a current of 0.4 A at 220 V , and a heater of resistance 48.4 Omega . The main line power supplied to the house is at 220 V . Calculate the bill for the month of january if tubelights and bulbs are used for 6 h daily, fans for 1 h daily , and heater for 10 h daily. The electricity is to cost Rs. 2 per unit.

An N-P-N transistor is being used in CE mode for which the current transfer ratio is alpha=(25)/(26) . The input resistance is 1000Omega and amplitude of A.C. input voltage is 10 mV. The amplitude of the amplified output collector current is

The following table gives the number of finished articles turned out per day be different number of workers in a factors. Find the standard deviation of the daily output of finished articles. Find the variance and standard deviation of the following frequency distribution: Number of article:, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 No. of workers:, 3, 7, 11, 14, 18, 17, 13, 8, 5, 4