IB HL Physics Poorly Answered Questions 3
/A third tutorial sheet of questions on poorly answered HL concepts is given below.
- A 6 Ω resistor is connected in series with a cell of emf 12 V of zero internal resistance, an ideal ammeter and an ideal voltmeter. Find the reading on each meter.
- State the definition of emf.
- An electron is in the fourth excited state of the hydrogen atom. How many different spectral lines could appear in the emission spectrum of this atom?
- The strong nuclear interaction between two protons (a) can be equal to zero (b) is repulsive for distances less than 3 fm, (c) is attractive for distances less than 3 fm, (d) is always greater than the Coulomb interaction between the protons
- A particular radioactive substance undergoes β- decay. Does the daughter nuclide always have the same energy?
- Two positive point charges are at a fixed distance apart. When the electric field due to the charges is zero the electric potential is (A) zero, (B) a maximum value, (C) a minimum value, (D) not defined
- In quantum tunnelling (A) the particle tunnels under the obstacle and fully appears on the other side (B) the particle is described by a wave function that exponentially decays through the barrier and is detected with less energy on the other side (C) the particle is described by a wave function that exponentially decays through the barrier and is detected with the same energy on the other side (D) the particle passes through the barrier instantaneously (see Nature July 22, 2020)
