Tiêu đề FIITJEE AITS 2019.pdf ✅

AITS-CRT-I (Paper-1)-PCM-JEE(Advanced)/19 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942 website: www.fiitjee.com 3 4. In figure, a ladder of mass m is shown leaning against a wall. It is in static equilibrium making an angle  with the horizontal floor. The coefficient of friction between the wall and the ladder is 1 and that between the floor and the ladder is 2. The normal reaction of the wall on the ladder is N1 and that of the floor is N2. If the ladder is about to slip, then (A)       1 2 2 mg 0 0 and N tan 2 (B)       1 2 1 mg 0 0 and N tan 2 (C)         1 2 2 1 2 mg 0 0 and N 1 (D)       1 2 1 mg 0 0 and N tan 2 5. In the series L – C – R circuit, the voltage across resistance, capacitance and inductance are 30V each at frequency f = f0. (A) It the inductor is short-circuited, the voltage across the capacitor will be 30 2 V. (B) If the capacitor is short-circuited, the voltage drop across the inductor will be 30 2 V. (C) If the frequency is changed to 2f0, the ratio of reactance of the inductor to that of the capacitor is 4 : 1. (D) If the frequency is changed to 2f0, the ratio of the reactance of the inductor to that of the capacitor is 1 : 4. 6. An ammeter has a resistance of 50  and a full scale deflection current of 50 A. It can be used as a voltmeter or as a higher range ammeter provided that a resistance is added to it. Choose the correct range and resistance combination from the following (A) 20 V range with approximately 400 k resistance in series (B) 100 V range with approximately 2 × 106 resistance in series (C) 1 mA range with 50  resistance in parallel (D) 0.1 mA range with 50  resistance in parallel Space for Rough work TG ~ @bohring_bot < 3