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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?
What is the specific resistance of material of a conductor. What do you mean by thermoelectric refrigerators?
The wave nature of light is demonstrated by which of the following a) The photoelectric effect b) Colour c) The speed of light d) Diffraction Ans: The w
Give the conditions needed for production and observation of interference pattern?
Explain the Ray Diagrams for Mirrors? To figure out the position and size of an image reflected by a curved mirror, you can draw a scaled diagram of the mirror as follows: along
Q. The work function of a metal surface is 1.8 eV. Compute the threshold wavelength. Work function W = hγ o = h C / λ 0 λ 0 = h C / W = 6.626 X 10 -34 X 3 X 10 8
VANDER WAALS BOND: A fourth type of bonding, which does not involve a transfer or sharing of electrons, is known as the Vander walls bond. It forms in atoms or molecules that b
Define about the Heat Loss? An immersion heater of power J=500 W can be used to heat water in a bowl. After 2 minutes the temperature enhance from T 1 =85 o C to T 2 =90°C. Th
Q. Define Specific Gravity? Answer:- Specific Gravity SG is a unit fewer quantities that gives the scientist or engineers an idea of how dense a substance is compared to w
Determine current flowing through 5 ? resistor in the circuit demonstrated in Figure. Use Source transformation technique. Ans: Determination of current flowing thr
With the help of a ray diagram, explain the formation of the final image of an object in a compound microscope. Derive a mathematical expression for its magnifying power.
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