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Which of the following statements is INCORRECT about the continental drift theory? 1. Alfred Wegener propounded his concept on the continental drift in the year 1912. 2. All the continents formed a single continental mass and a mega ocean surrounding the same. 3. The super continent was called ‘Pangaea’ and the mega ocean was called ‘Panthalassa’.
A copper wire of length l and diameter d has potential difference V applied at its two ends. The drift velocity is V. If the diameter of wire is made d/4, then drift velocity becomes ___________
Consider the following statements with regard to power diodes: 1. The breakdown voltage is directly proportional to the doping density of the drift region. 2. Losses in the diode are less due to conductivity modulation of the drift region in the on-state. 3. The vertically oriented structure supports large blocking voltages. Which of the above statements is/are correct?
Consider the following statements regarding continental drift theory Continental drift theory had been propounded by Alfred Wegner All the landmasses were once part of the super continent or Pangaea. As a support to the theory, Wegener presented jig-saw-fit Select the correct answer using the following codes.
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): In Gunn effect, when electric field is varied from zero to a threshold value the drift velocity decreases. Reason (R): Beyond the threshold electric field, if the electric field is increased, the drift velocity is decreased and the diode exhibits negative resistance. In the light of the above statement, choose the most appropriate answer from the options given below:
Determine drift time for carrier across depletion region for photodiode having intrinsic region width of 30μm and electron drift velocity of 105 ms-1.
If the length of the intrinsic region in IMPATT diode is 2 µm and the carrier drift velocity are 107 cm/s, then the drift time of the carrier is:
In case of drift method of tunnelling, the drift may be excavated at
The fan drift pressure readings and fan quantities are measured to be 500 Pa and 65 m3/s respectively at the time when NVP aids fan pressure. On reversal, the fan delivers a quantity of 50 m3/s while acting against NVP with fan drift pressure of 600 Pa. Assuming that the NVP remains constant in both cases the total resistance of the mine in Ns2/m8 will be
Sean, Han, and D.K. drift through a large crowd at what famous Tokyo location in Tokyo Drift?