CAIE A-Level Physics A2 22.3.4 H P Questions

[Maximum number: 4]

(a)

A particle of matter moves with momentum p.

[ 2 ]

(i)

State the equation that gives the effective wavelength $\lambda$ of the particle. State the name of any other symbols used.

[ 2 ]

$\lambda=h / p$
h is the Planck constant

(b)

Electrons are accelerated from rest through a potential difference (p.d.) of 4.8 kV .

[ 2 ]

(i)

Calculate the effective wavelength of a beam of electrons moving at the speed in (c)(i).
wavelength = m

[ 2 ]

$\begin{aligned} \lambda =h / m v =6.63 \times 10^{-34} /\left(9.11 \times 10^{-31} \times 4.1 \times 10^{7}\right) \end{aligned}$ $=1.8 \times 10^{-11} \mathrm{~m}$

All question bank results loaded

CAIE A-Level Physics A2 22.3.4 H P Topic Practice

Question 1

Question (a)

Question (i)

Question (b)

Question (i)