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An electric lamp of 100 Ω, a toaster of resistance 50 Ω, and a water filter of resistance 500 Ω are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as a1 AnswerAn electric lamp, whose resistance is 20 Ω, and a conductor of 4 Ω resistance are connected to a 6 V battery. Calculate (a) the total resistance of the circuit, (b) the current through the circuit, and (c) the potential difference acr1 AnswerA hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 Ω resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases? -CBSE Physics 1 AnswerAn electric iron of resistance 20 Ω takes a current of 5 A. Calculate the heat developed in 30 s. -CBSE Physics 1 AnswerThe differential amplifier is connected as shown in the figure(b) above to a single strain gage bridge. Let the strain gage resistance vary around its no load resistance R by ±1%. GATE-Instrumentational-Engineering-20131 AnswerAn electric iron has a rating of 750 W, 220 V. Calculate -2007 CBSE Physic class 101 AnswerTwo metallic wires A and B of the same material are connected in parallel. Wire A has length l and radius r, wire B has a length 2l and radius 2r. Compute the ratio of the total resistance of parallel combination and the resistance of wire A. -CBSE p1 Answer Several electric bulbs designed to be used on a 220 V electric supply line, are rated 10 W. How many lamps can be connected in parallel with each other across the two wires of 220 V line if the maximum allowable current is 5 A? -CBSE Physics 1 AnswerJudge the equivalent resistance when the following are connected in parallel – (a) 1 Ω and 106 Ω, (b) 1 Ω and 103 Ω, and 106 Ω. -CBSE Physics 1 AnswerAn electric iron consumes energy at a rate of 840 W when heating is at the maximum rate and 360 W when the heating is at the minimum. The voltage is 220 V. What are the current and the resistance in each case? -CBSE Physics 1 AnswerA 230 V, 50 Hz ac supply is applied to a coil of 0.06 H inductance and 2.5 resistance connected in series with a 6.8 µF capacitor. Calculate (i) Impedance (ii) Current (iii) Phase angle between current and voltage (iv) power factor1 AnswerWhich has a higher resistance : a 50 W lamp bulb or a 25 W lamp bulb and how many times ? -2005 CBSE Physic class 101 AnswerIn a household electric circuit different appliances are connected in parallel to one another. Give two reasons. 2009 CBSE Physic class 101 Answer When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor. -CBSE Physics 1 AnswerA long-channel NMOS transistor is biased in the linear region with 𝑉𝐷𝑆=50 mV and is used as a resistance. Which one of the following statements is NOT correct? Gate-20161 Answer Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is 220 V? -CBSE Physics 1 AnswerR1 = 10 Ω, R2 = 40 Ω, R3 = 30 Ω, R4 = 20 Ω, R5 = 60 Ω, and a 12 V battery is connected to the arrangement. Calculate (a) the total resistance in the circuit, and (b) the total current flowing in the circuit-CBSE Physics 1 AnswerHow can three resistors of resistances 2 Ω, 3 Ω, and 6 Ω be connected to give a total resistance of (a) 4 Ω, (b) 1 Ω? -CBSE Physics 1 AnswerFill in the blanks GATE-Instrumentation-Engineering-20141 AnswerA good transconductance amplifier should have -gate Electronics and Communication 20171 Answer