# Recent questions tagged q120

### A zener diode voltage regulator operated in the range 120 - 180 V produces a constant supply of 110 V and 250 mA to the load. If the maximum current is to be equally shared between the load and zener, then the value of series resistance $(R_S)$ and load resistance (R_L)$are : ### Which of the following statement is not correct when a junction diode is in forward bias? ### A conductor has a non-uniform section as shown in the figure. A steady current is flowing through it. Then the drift speed of the electrons ### A wheel of radius 0.4 m can rotate freely about its axis as shown in the figure. A string is wrapped over its rim and a mass of 4 kg is hung. An angular acceleration of$8\;rad-s^{-2}$is produced in it due to the torque. Then moment of inertia of the wheel is : ### The emf of a cell E is 15 V as shown in the figure with an internal resistance of$ 0.5 \Omega $. Then the value of the current drawn from the cell is ### A transistor having a$\beta$to$80$has a change in base current of$250\; \mu A$then the change in collector current is : ### The sensitivity of a galvanometer is$60$divisions /Amp. When a shunt is used, its sensitivity become 10 divisions/Amp. If the galvanometer is of resistance$20 \Omega$, the value of shunt used is : ### Of the following,$NAND$gate is ### In the set of real numbers$R,$an operation$^\ast $is defined by$a^\ast b=\sqrt{a^{2}+b^{2}}.$Then the value of$(3^\ast4)^\ast 5$is ### The area of the triangle formed by the tangent at any point on the rectangular hyperbola$xy=72\$ and its asymptotes is

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