## Current Electricity Quiz-10

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background.

Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced.

Q91. A student has 10 resistors of resistance 'r'. The minimum resistance made by him from given resistors is
•  10 r
•  r/10
•  r/100
•  r/5
Solution
To obtain minimum resistance, all resistors must be connected in parallel. Hence equivalent resistance of combination of combination =r/10

Q92.The value of current I in figure is

•  4A
•  6A
•  3A
•  5A
Solution

Q93.  Which of the following relation is wrong?
•   1 ampere ×1 ohm=1 volt
•  1 watt ×1 sec=1 joule
•  1 newton per coulomb =1 volt per metre
•  1 columb ×1 volt=1 watt
Solution
1 coulomb ×1volt=1 joule Hence, option (d) is correct.

Q94. In the circuit shown below the resistance of the galvanometer is 20 Î©. In which of the following alternative are the currents arranged strictly in the decreasing order

•  i,i1,i2,ig
•  i,i2,i1,ig
•  i,i2,ig,i1
•  i,i1,ig,i2
Solution
i∝1/R

Q95.A potentiometer wire of length 1m and resistance 10 Î© is connected in series with a cell of emf 2V with internal resistance 1 Î© and a resistance box including a resistance R. If potential difference between the ends of the wire is 1 mV, the value of R is
Solution

Q96. An ammeter reads 0.90 A when connected in series with a silver voltmeter that deposits 2.60 g of silver in 40 min. By what percentage is the ammeter reading is correct? Atomic weight of silver = 108 and 1 F=96500 C?
•  5%
• 7%
•  -5%
•  -7%
Solution

Q97.The following four wires are made of the same material and are at the same temperature. Which one of them has the highest electrical resistance?
•  Length=50 cm, diameter=0.5 mm
•  Length=100 cm, diameter=1 mm
•  Length=200 cm, diameter=2 mm
•  Length=300 cm, diameter=3 mm
Solution

Q98.To get maximum current through a resistance of 2.5 Î©, one can use m rows of cells, each row having n cells. The internal resistance of each cell is 0.5 Î©. What are the values of n and m, if the total number of cell is 45?
•  2 rows of 12 cells connected in parallel
•  3 rows of 8 cells connected in parallel
•  4 rows of 6 cells connected in parallel
•  All of these
Solution

Q99.Two different metals are joined end to end. One end is kept at constant temperature and the other end is heated to a very high temperature. The high depicting the thermo e.m.f. is
•

•

•

•

Solution

Q100. In an experiment, a graph was plotted of the potential difference V between the terminals of a cell against the circuit current i by varying load rheostat. Internal conductance of the cell is given by
•  xy
•  y/x
•  x/y
• (x-y)
Solution
Here internal resistance is given by the slope of graph i.e.x/y. But conductance =1/Resistance=y/x

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