A particle has momentum kg m/s. What is its de Broglie wavelength? ( J s)
Answer and explanation
Correct answer: B. m
- Step 1: De Broglie: . Step 2. m. **Answer: m. Why not the others:** Multiplying h and p, or inverting the ratio, gives the other values; a power of ten was misplaced in the last.
Practise more Electricity, Magnetism, Optics and Modern Physics.
Free questions with an explanation for every one, and full timed Wazari Exam (Iraq Baccalaureate) - Scientific Branch mock tests.
More Electricity, Magnetism, Optics and Modern Physics questions
- A 12 V battery is connected across a 4 ohm resistor. What current flows?
- A 6 ohm and a 3 ohm resistor are connected in parallel. What is their combined resistance?
- A current of 2 A flows through a 5 ohm resistor. What power is dissipated?
- A 10 microfarad capacitor is charged to 100 V. How much energy does it store?
- Point charges of 2 microcoulomb and 3 microcoulomb are 0.3 m apart in air. What is the magnitude of the force between them? (…
- A straight wire 0.2 m long carries 4 A at right angles to a uniform field of 0.5 T. What is the force on the wire?