How good is your knowledge of basic electronics? Test it through these questions on Basic Electronics MCQs with answers. Basic Electronics is the study of electrical devices, circuits, and systems. This field is widely applied in the area of telecommunications which includes mobile phones, radios, etc.
Which of the following is not a characteristic of UJT? A. Intrinsic stand off ratio B. Negative resistance C. Peak-point voltage D. Bilateral conduction Answer: Bilateral conduction Explanation: Bilateral conduction is not a characteristic of UJT
A diac is turned on by ____ A. A breakover voltage B. Gate voltage C. Gate current D. None of the above Answer: A breakover voltage Explanation: A diac is turned on by a breakover voltage.
When the temperature increases, the inter-base resistance (RBB) of a UJT ____ A. Increases B. Decreases C. Remains the same D. None of the above Answer: Increases Explanation: When the temperature increases, the inter-base resistance (RBB) of a UJT Increases
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ____ A. High B. Low C. Extremely low D. None of the above Answer: High Explanation: When the emitter terminal of a UJT is open, the resistance between the base terminal is generally high.
A triac has ____ semiconductor layers A. Two B. Three C. Four D. Five Answer: Four Explanation: A triac has four semiconductor layers.
The device that does not have the gate terminal is ____ A. Triac B. FET C. SCR D. Diac Answer: Diac Explanation: The device that does not have the gate terminal is Diac.
In a UJT, the p-type emitter is ____ doped. A. Lightly B. Heavily C. Moderately D. None of the above Answer: Heavily Explanation: In a UJT, the p-type emitter is Heavily doped.
Between the peak point and the valley point of UJT emitter characteristics we have ____ region. A. Saturation B. Negative resistance C. Cut-off D. None of the above Answer: Negative resistance Explanation: Between the peak point and the valley point of UJT emitter characteristics we have a negative resistance region.
After peak point, the UJT operates in the ____ region. A. Cut-off B. Saturation C. Negative resistance D. None of the above Answer: Negative resistance Explanation: After peak point, the UJT operates in the Negative resistance region.
The unit of electrical resistance is A. Volt B. Amp C. Ohm D. Coulomb Answer: Ohm Explanation: The unit of electrical resistance is Ohm.