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In the circuit shown in Figure, with the switch in position 1, the capacitor is uncharged.
If he switch is moved to position 2 at time t =0s, measure
(i) The initial current through the 0.5MΩ,
(ii) The voltage across the capacitor when t =1.5s, and
(iii) The time taken for the voltage across the capacitor to reach 12V
Draw a schematic diagram of a single optical fibre structure. Describe briefly how an optical fibre is fabricated. Explain in brief, the mechanism of propagation of light signal by
4
The phase of weightlessness may be observed in the following situations: (i) When objects fall freely under gravity : For example, a lift goes down freely, or an airship showing
A monochromatic parallel beam of light is incident on a single slit. Graphically show the intensity distribution among the secondary maxima and principle maxima in diffracted beam.
Discuss the Factor affecting limiting current.
1+1
Positive charge on n-side of the junction Some of the free electrons move across the junction from n-type to p-type, leaving behind positive donor ions as they
Factors on which Resistance Depends: Resistance of the conductor depends on the following factors. Nature of the conductor. Length of the conductor. Area of cross sect
Production of electricity by heat: The Seebeck effect - the thermocouple . When two different metals are brought into contact with one another, it is found that electrons can
mass of body= 4 kg is dropped form height= 45 m Calculate the kinetic energy just before hitting the ground
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