Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE MainPhysicsSemiconductors

In an electrical circuit, three switches A , B , and C are used to control an LED. Switches A and B are connected in parallel to each other. This parallel combination is then connected in series with switch C . Finally, this entire three-switch arrangement is connected in parallel across the LED. A battery and a series resistor are used to power the circuit (the resistor prevents the battery from short-circuiting). T

Options

  1. AY = (A+B) C
  2. BY = (A+B) C
  3. CY = (A B) + C
  4. DY = A B C

Correct answer

B. Y = (A+B) C

Step-by-step solution

The condition for the switch arrangement to conduct current is that switch C must be closed AND at least one of the switches A or B must be closed. In Boolean algebra, switches in parallel represent the OR operation ( A+B ), and switches in series represent the AND operation ( ). Thus, the Boolean expression for the switch path conducting is (A+B) C . Since the entire switch arrangement is connected in parallel across the LED, it will short-circuit the LED whenever it conducts. When the LED is short-circuited, it d

Practice Semiconductors on Quantrex Academy →

More from Semiconductors

The output Y for the given inputs A and B to the circuit is: 2026Refer to the logic circuit given below. For two inputs (A=1, B=1) and (A=0, B=1) , output (Y) will be __________. 2026The maximum rated power of the LED is 2 mW and it is used in the circuit with input voltage of 5 V as shown in the figure below. The current through resistance R_S is 0.5 mA. The m 2026In a semiconductor p-n diode, the doping concentrations on p-side and n-side are 10¹⁵ atoms/cm ^3 and 10¹⁸ atoms/cm ^3 , respectively. Which one of the following statements is true 2026For the given logic circuit, which of the following inputs combination will make both LED -1 and LED -2 to glow? 2026Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: A diode under reverse-biased condition provides very small current 2026A diode has Zener voltage of 10 V and maximum power dissipation of 0.5 W, then the minimum resistance to be used in series with this diode for safety when it is connected to a 25 V 2026Two 4 bits binary numbers, A = 1101 and B = 1010 are given in the inputs of a logic circuit shown in figure below. The output (Y) will be: 2026 Full Semiconductors list All JEE Main PYQs