## Current Electricity Quiz-6

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.

s..

Q51. The accurate measurement of emf can be obtained using
•  Multimeter
•  Voltmeter
•  Voltameter
•  Potentiometer
Solution
For greater sensitivity of meter bridge the resistance (R) taken in the resistance box should be such that the null point is nearly in the middle of the wire. In this position all resistance P, Q, R and S become nearly equal. The emf of cell depends upon the size and area of electrodes.

Q52.Three unequal resistors in parallel are equivalent to a resistance 1 Î©. If two of them are in the ratio 1:2 and if no resistance value is fractional, the largest of the three resistance in ohm is
•  4
•  6
•  8
•  12
Solution

Q53.   A current of 2 A passing through conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is
Solution

Q54. In a copper voltmeter , if the current (I) and time (t) variations of the type as shown in figure, the mass deposited in 30 min is [Atomic weight of copper is 63.5 and Faraday constant is 96500 C per g equivalent]
•  0.078 g
•  0.054 g
•  0.039 g
•  0.0195 g
Solution

Q55.The graph between resistivity and temperature, for a limited range of temperatures, is a straight line for a material like
•  Copper
•  Nichrome
•  Silicon
•  Mercury
Solution
For a limited range of temperatures, the graph between resistivity and temperature is a straight line for a material like nichrome as shown in the figure

Q56.

•  Decreases the resistance R
•  Increase the resistance R
• Reverse the terminals of battery V
•  Reverse the terminals of cell E
Solution
Decreases the resistance R

Q57.The relation between Seeback coefficient (or thermo electric power) S and Peltier coefficient Ï€ is given by
•  S=Ï€T
•  S=Ï€/T
•  S=Ï€2/T
•  S=Ï€/T2
Solution
S=Ï€/T

Q58.Electromotive force is the force, which is able to maintain a constant
•  Current
•  Resistance
•  Power
•  Potential difference
Solution
Potential difference

Q59.

•  r/R
•  R/r
•  r/(R+r)
•  R/(R+r)
Solution

Q60. In the circuit shown, A and V are ideal ammeter and voltmeter respectively. Reading of the voltmeter will be
•  1V
•  2V
• 0.5 V
•  Zero
Solution
Zero (No potential difference across voltmeter)

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