four parallel plate capacitors (A. B.C. and D> are connected in parallel !o a 12

Question

four parallel plate capacitors (A. B.C. and D> are connected in parallel !o a 12 V battery .Some information on caeh is given below. Kank the capacitors by the potential difference between their plates them Iron: lea.it to greatest Ca=12 muf; aa=4.5 m2; cb=5 muf; ab=9.0 mm2; cc=16 muf; ac=4.5 mm2; cd=28 muf; ad9.0 mm2; Rank the circuits by the current through the battery from least to greatest Answer: four identical circular loops ol wire are placed perpendicular to four different, vertical magnetic fields (A. B.C. and D). Over the course of 3X1 sec these magnetic fields change at a fixed rate. The initial magnetic field strength and rate ol change lor each is given below. Rank the lour loops by the magnitude ol induced current, during the 3X1 sec ol change. Irorr. smallest to largest. a) ba=1.20t: rate of change:0.65t/s b) bb=1.50t:rate of change:0.15t/s c) bc=1.15t:rate of change: 0.25t/sd)bd=1.65t:rate of change:0.45t/s sunlight passes through a transmissive diffraction grating making a rainbow interference pattern on a screen. Rank the four typesof light listed below (labeled a,,c and d) by the relocation of their m=1cfringe on the screen.rank these locations from closes to the centre to farthest. green blue red d)violet four identical converging lenses (labeled a, b, c ,and d) each have a focal length of 10 cm. each lens its set up with an object distances are given below. rank the the four setups by the magnitude of the magnification from least to greatest. da20.0 cm db=45.0 cm dc=15.0 cm dd=35.0 cm

Explanation / Answer

Hii,

41) You say that the capacitors are connected in parallel, sothey all must have the same potential difference betwwen the plates.

42) We know that the current is inversely proportional to the resistance, we find the effective resistance in each circuit.

A-3R/2

B-2R

C-R

D-R/2.

Now if we arrange the resistances in greatest to least , then we will get current in least to greatest.

So the order is B,A,C,D

43) We Know that the current is directly proportional to the change in magnetic flux. Here as the area of the loop is same, we can consider the change in magnetic field as the relation.

So higher the rate, more is the current.

So yhe order is A,D,C,B

44) Sunlight when diffracted, forms seven bangs of VIBGYOR. but the order is reverse the way we write.

So violet is highly diffracted, then is blue, then is green and then is red. So farthest is violet, then blue, then green and then red.

45) We find the image distances, and then we find (-v/u) where u is the object distance an v is the image distance . this gives the magnification. and then we compare.. I found out to be B,D,A and C

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