JEE & NEETJEE Physics JEE Main Physics 100+ MCQ & Answer | Page-09 | JEE & NEET MCQ February 4, 2025 DSN MARATHI 81. The maximum impedance of a transmission line 50 ohm and the standing wave ratio of 2.5 is _______. A. 20 B. 125 C. 200 D. 75 Answer Option : B 82. A transmission line has a voltage of 24 V and a conduction current of 1.2 A. What will its receiving impedance? A. 25.2 B. 22.8 C. 28.8 D. 20 Answer Option : D 83. What is the value of negative sequence impedance? A. 1 B. Z C. same as positive sequence D. infinity Answer Option : C 84. What is the value of input impedance of a quarter-wave line 50 ohm and the load impedance of 20 ohms? A. 50 B. 20 C. 1000 D. 125 Answer Option : D 85. The standing wave ratio is 4 for a transmission line of 75 ohms. What is the value of the minimum impedance? A. 75 B. 300 C. 18.75 D. 150 Answer Option : C 86. What is the value of the characteristic impedance of a transmission line with impedance and admittance of 16 and 9? A. 25 B. 1.33 C. 0.75 D. 7 Answer Option : B 87. The value of input impedance for a matched line will be equal to _______. A. Load impedance B. Characteristic impedance C. Output impedance D. Zero Answer Option : B 88. What is the normally chosen value of the characteristic impedance of a transmission line? A. 50 B. 75 C. 50 or 75 D. 100 Answer Option : C 89. When can we say that the resultant of the two vectors is maximum ? A. When the vectors are acting in the opposite direction B. Both the vectors are acting in the same direction C. When the vectors are at right angles D. When the vectors are parallel to each other Answer Option : B 90. What does the area under acceleration-time graph represent for any given time interval ? A. Final velocity B. Distance travelled C. Change in the velocity in that time interval D. Displacement of the particle Answer Option : C
81. The maximum impedance of a transmission line 50 ohm and the standing wave ratio of 2.5 is _______. A. 20 B. 125 C. 200 D. 75 Answer Option : B
82. A transmission line has a voltage of 24 V and a conduction current of 1.2 A. What will its receiving impedance? A. 25.2 B. 22.8 C. 28.8 D. 20 Answer Option : D
83. What is the value of negative sequence impedance? A. 1 B. Z C. same as positive sequence D. infinity Answer Option : C
84. What is the value of input impedance of a quarter-wave line 50 ohm and the load impedance of 20 ohms? A. 50 B. 20 C. 1000 D. 125 Answer Option : D
85. The standing wave ratio is 4 for a transmission line of 75 ohms. What is the value of the minimum impedance? A. 75 B. 300 C. 18.75 D. 150 Answer Option : C
86. What is the value of the characteristic impedance of a transmission line with impedance and admittance of 16 and 9? A. 25 B. 1.33 C. 0.75 D. 7 Answer Option : B
87. The value of input impedance for a matched line will be equal to _______. A. Load impedance B. Characteristic impedance C. Output impedance D. Zero Answer Option : B
88. What is the normally chosen value of the characteristic impedance of a transmission line? A. 50 B. 75 C. 50 or 75 D. 100 Answer Option : C
89. When can we say that the resultant of the two vectors is maximum ? A. When the vectors are acting in the opposite direction B. Both the vectors are acting in the same direction C. When the vectors are at right angles D. When the vectors are parallel to each other Answer Option : B
90. What does the area under acceleration-time graph represent for any given time interval ? A. Final velocity B. Distance travelled C. Change in the velocity in that time interval D. Displacement of the particle Answer Option : C
