The diagram shows a Maltese Cross Tube.

The shadow of the green Maltese Cross is shaped in a position similar to the shaded by filament light.

What conclusion can be drawn from the above experiment?

Which particle is cathode ray?

Source: SPM 2013

The diagram shows the main structure of a cathode ray oscilloscope (CRO).

Which part of the CRO causes a deflection in the vertical direction when a voltage is applied across them?

Source: Trial SPM Negeri Sembilan 2019

 In a vacuum tube, the resulting cathode rays are accelerated through a potential difference of \(4.3 \space \text {kV}\).

Calculate the electrical potential energy of the cathode ray initially.

[Electron charge, \(e = 1.6 \times 10^{-19} \space \text C\)]

(A)  \(5.44 \times 10^{-16} \space \text J\)

(B)  \(4.84 \times 10^{-16} \space \text J\)

(C)  \(3.76 \times 10^{-16} \space \text J\)

(D)  \(6.88 \times 10^{-16} \space \text J\)

The cathode rays generated in a vacuum tube are accelerated through a potential difference of \(255 \space \text V\).

Calculate the maximum velocity of the electron.

[Mass of electron, \(m = 9.1 \times 10^{-31} \space \text {kg}\), electron charge, \(e = 1.6 \times 10^{-19} \space \text C\)]

 (A)  \(9.5 \times 10^4 \space \text m \text s^{-1}\)

(B)  \(1.01 \times 10^5 \space \text m \text s^{-1}\)

(C)  \(9.5 \times 10^6 \space \text m \text s^{-1}\)

(D)  \(1.03 \times 10^7 \space \text m \text s^{-1}\)