2009 WAEC Physics Theory a)        List two properties of cathode rays. (b)        Explain how the intensity and energy of...

a) List two properties of cathode rays.
(b) Explain how the intensity and energy of cathode rays may be increased

(a) Properties of cathode rays:
Cathode rays

1. are negatively charged.
2. travel in straight line in field free space.
3. are deflected by electric/magnetic field.
4. possess(kinetic) energy.
5. possess momentum.

(b)(i) The intensity of cathode rays may be increased by raising the temperature of the cathode/increasing the current through the heater.

(ii) The energy of cathode rays may be increased by raising the potential difference between the anode and the cathode/the anode potential.

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