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Define the terms threshold frequency and stopping potential in relation to the phenomenon of photoelectric effect. How is the photoelectric current affected on enhancing the
(i) frequency
(ii) intensity of the incident radiations and why?
Verify the principle of potentiometer. Illustrate a circuit diagram used to compare the e.m.f. of two primary cells. Write the formula used. How can the sensitivity of a potentiome
An isotope of iodine (Z = 53) is used to treat thyroid conditions. Its mass number is 131. How many neutrons are in its nucleus? 131 - 53 = 78 neutrons
How are extrinsic fiber optic sensors used? Extrinsic fiber optic sensors give best protection of measurement signals against noise corruption. Unluckily, several conventional
define unlike parallel forces with example
a) Heat produced or absorbed at a junction is proportional to the current by the junction. b) This effect is produced when current is passed by junction of suitable materials.
the centre of oscillation of a meter stick suspended about a transverse axis is located at the 10cm mark.Determine at what other positions could the meter stick be suspended and ha
Analogue multimeter: Even the most basic analogue multimeter can prove to be invaluable when in the hands of an experienced user. Simple measurements of voltage, current and r
The position of an airplane as a function of time is shown in the figure below. a. What is the average velocity of the airplane? b. What is the average speed of the air
Essential properties of the medium for wave propagation: (i) Elasticity: So that particle can return to their mean position, after having been disturbed. (ii) Inertia : So t
what is deforming force
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