Question
Download Solution PDFIf a transistor operates at the middle of the dc load line, an increase in the current gain will move the Q point
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is: 3) Up on the load line
Explanation:
-
The Q-point (Quiescent point) is the operating point of a transistor on the DC load line, typically chosen in the middle for maximum undistorted output swing.
-
The DC load line is a straight line that shows all possible combinations of collector current (IC) and collector-emitter voltage (VCE) for a given load resistor and supply voltage.
When current gain (β) increases:
-
The base current (IB) remains constant (if the base biasing is fixed).
-
But since IC = β × IB, a higher β leads to higher collector current (IC).
-
As IC increases, the collector-emitter voltage (VCE) drops (Ohm's law: VCE = VCC - IC×RC).
This moves the Q-point up on the load line (higher IC, lower VCE).
Last updated on Jun 24, 2025
-> ISRO Scientist Engineering apply online 2025 link has been activated (ISRO:ICRB:03(CEPO):2025).
-> A total of 39 vacancies are announced for the ISRO recruitment in Civil, RAC and other disciplines
-> ISRO Scientist Engineering recruitment 2025 notification has been released for 320 vacancies. The last date to fill ISRO application form is June 16 (Advt No. ISRO:ICRB:02(EMC):2025).
-> ISRO Scientist Engineer recruitment 2025 for 31 vacancies has been released.
->ISRO Scientist recruitment 2025 notification has been released.
->The last date to apply for ISRO scientist recruitment 2025 is May 30 ( Advt.No. ISRO:ICRB:01:(EMC):2025).
->Candidates with BE/BTech degree in the respective discipline can only apply for ISRO Scientist recruitment 2025.
-> Candidates can refer ISRO Scientist previous year paper to prepare for the exam.