Home › JEE Main › Physics › Semiconductor Devices › For NPN transistor in active mode, base-emitter …
For NPN transistor in active mode, base-emitter junction is ___ and base-collector is ___:
ABoth off
BBoth forward
CBoth reverse
DForward and reverse — BE forward, BC reverse (active region)
Answer & Solution
Correct answer: D. Forward and reverse — BE forward, BC reverse (active region)
Active mode: BE forward bias (inject electrons into base), BC reverse bias (collect electrons that diffuse across thin base region). Both forward = saturation; both reverse = cutoff.
Related questions
Truth table for AND gate (2 inputs): output is 1 when:For a full-wave bridge rectifier with AC input V_rms, peak DC output voltage:Common-emitter transistor with β = 100 has base current 50 μA. Collector current:For Si diode with reverse saturation current I₀ = 10⁻¹² A at room temperature (V_T = kT/e In doped semiconductor at thermal equilibrium: n_e × n_h =Intrinsic carrier concentration of Si at 300 K is approximately:Solar cell converts:For NAND gate: output is 0 when: