Holes are majority carriers in …

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Holes are majority carriers in …

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It is observed that when the cap of an uncharged electroscope is irradiated with light of high frequency, the leaf of the electroscope rises. Explain this observation.
An iron box has a resistance coil of 30 Ω and takes a current of 10 A. Calculate the heat in kJ developed in 1 minute.
Figure 2 shows circular waves originating from the principal focus F of a concave mirror and moving towards the mirror. Complete the diagram to show the reflected waves
The figure below shows how a distant object is focused in a defective eye. State the nature of the defect. Suggest suitable lens to correct the defect Read more at: https://www.easyelimu.com/high-school-notes/physics/item/2496-thin-lenses
At 200C, the pressure of a gas is 50 cm of mercury. At what temperature would the pressure of the gas fall to 10 cm of mercury?
A capacitor of two parallel plates separated by air has a capacitance of 15pF. A potential difference of 24 volts is applied across the plates, a) Determine the charge on the capacitors. b) When the space is filled with mica, the capacitance increases to 250pF. How much more charge can be put on the capacitor using a 24 V supply?
State two uses of a charged gold leaf electroscope.
A truck weighs 1.0×105 N and is free to move. What force willgiveit an acceleration of 1.5 m/s2? (take g=10N/kg)