jee_main_2024_30_jan_morning - Alternating Current Topics

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QUESTION #41 Transformers
Primary coil of a transformer is connected to 220V ac. Primary and secondary turns of the transforms are 100 and 10 respectively. Secondary coil of transformer is connected to two series resistance shown in shown in figure. {{IMG1}} The output voltage (V₀) is: {{IMG2}}
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QUESTION #50 Power Factor in AC Circuits
A series L,R circuit connected with an ac source E = (25 1000t)V has a power factor of 1√(2). If the source of emf is changed to E = (20 2000t)V, the new power factor of the circuit will be:
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Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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