The cross section of a JFET is shown in the following figure. Let Va be - 2 V and let Vp be the initial pinch-off voltage. If the width W is doubled (with other geometrical parameters and doping levels remaining the same), then the ratio between the mutual transconductances of the initial and the modified JFET is

• A. 4
• B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-07-52-2.png">
• C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-07-52-3.png">
• D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-07-52-4.png">