Voltmeter connected parallel, should draw minimum current, so ideally infinite resistance. Ammeter connected series, ideally zero resistance. Galvanometer moderate. Practical voltmeter has high but finite resistance.
Explanation:
Doppler effect: apparent change in frequency due to relative motion. Siren pitch changes as it approaches/recedes. Echo is reflection. Bending is diffraction. Fusion is nuclear reaction.
Explanation:
Most solar cells use silicon (monocrystalline or polycrystalline). Other materials: gallium arsenide, cadmium telluride. Silicon is semiconductor, abundant, efficient. Converts sunlight to electricity.
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