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An 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 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 AnswerAn 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 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 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 AnswerAn electric iron has a rating of 750 W, 220 V. Calculate -2007 CBSE Physic class 101 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 AnswerThe circuit below incorporates a permanent magnet moving coil milli–ammeter of range 1 mA having a series resistance of 10kΩ. Assuming constant diode forward resistance of 50Ω a forward diode drop of 0.7 V and infinite reve1 AnswerWhat is (a) the highest, (b) the lowest total resistance that can be secured by combinations of four coils of resistance 4 Ω, 8 Ω, 12 Ω, 24 Ω? -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 AnswerLet the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it? -CBSE Physics 1 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 AnswerA 4 Ω resistance wire is doubled on it. Calculate the new resistance of the wire.-CBSE Physics 1 AnswerA good transconductance amplifier should have -gate Electronics and Communication 20171 AnswerFill in the blanks GATE-Instrumentation-Engineering-20141 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 Answer100 J of heat are produced each second in a 4 Ω resistance. Find the potential difference across the resistor. -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 Answer