Q1 · medium · AI-verified
Which logic gate gives an output of 1 only when all inputs are 0?
- NAND gate
- NOR gate
- AND gate
- XOR gate
Q2 · medium · AI-verified
In α-decay, the mass number of the parent nucleus decreases by:
- 0
- 4
- 1
- 2
Q3 · medium · AI-verified
In a common-emitter transistor amplifier, if the current gain β = 100 and the base current IB = 40 μA, what is the collector current IC?
- 40 mA
- 0.4 mA
- 4 mA
- 400 μA
Q4 · easy · AI-verified
According to Bohr's model, what happens when an electron jumps from a higher energy level to a lower energy level?
- No energy change occurs
- A photon is absorbed
- An electron is emitted
- A photon is emitted
Q5 · medium · AI-verified
The de Broglie wavelength associated with an electron accelerated through a potential difference of 100 V is approximately: (m = 9.1 × 10⁻³¹ kg, e = 1.6 × 10⁻¹⁹ C, h = 6.6 × 10⁻³⁴ Js)
- 3.9 Å
- 2.46 Å
- 0.62 Å
- 1.23 Å