Current-Electricity-Quiz-3

Current Electricity Quiz-3

Dear Readers,

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. 

Q21. A resistance of 4Ω and a wire of length 5 metres and resistance 5Ω are joined in series and connected to a cell of e.m.f. 10 V and internal resistance 1Ω. A parallel combination of two identical cells is balanced across 300 cm of the wire. The e.m.f. E of each cell is

•  1.5 V
•  3.0 V
•  0.67 V
•  1.33 V

Solution
                             

 

Q22.Two wires of the same material and equal length are joined in parallel combination. If one of them has half the thickness of the other and the thinner wire has a resistance of 8 ohms, the resistance of the combination is equal to

•  5/8 ohm
•  8/5 ohm
•  3/8 ohm
•  8/3 ohm

Solution
                           

Q23.  In the circuit shown in figure, the points F is grounded. Which of the following is wrong statement?

•   D is at 5V
•  E is at zero potential
•  The current in the circuit will be 0.5 A
•  The potential at E is same whether or not F is rounded

Solution
                            

Q24. What is the equivalent resistance between the points A and B of the network

                                        

•  57/7 Ω
•  8 Ω
•  6 Ω
•  57/5 Ω

Solution
                       

Q25.Which of the following statements is correct

•  Liquids obey fully the ohm's law
•  Liquids obey partially the ohm's law
•  There is no relation between current and p.d. for liquids
•  None of the above

Solution
 In VI graph, we will not get a straight line in case of liquids

Q26. In a Wheatstone bridge, P=90Ω,Q=110Ω,R=40Ω and S=60Ω and a cell of 4 V emf. Then the potential difference between the diagonal along which a galvanometer is connected is

•  -0.2 V
•  +0.2 V
• -1 V
•  +1 V

Solution
                            

Q27.Two electric bulbs, one of 200 volt 40 watt and the other 200 volt 100 watt are connected in a house wiring circuit

•  They have equal currents through them
•  The resistance of the filaments in both the bulbs is same
•  The resistance of the filament in 40 watt bulb is more than the resistance in 100 watt bulb
•  The resistance of the filament in 100 watt bulb is more than the resistance in 40 watt bulb

Solution
                              

Q28.An electric current passes through a circuit containing two wires of the same material connected in parallel. If the lengths of the wires are in the ratio of 4/3 and radius of the wires are in the ratio of 2/3, then the ratio of the current passing through the wires will be

•  3
•  1/3
•  8/9
•  None of these

Solution
                        

Q29.A heater is operated with a power of 1000W in a 100V line. It is connected in combination with a resistance of 10Ω and a resistance R to a 100V line as shown in figure. What should be the value of R so, that the heater operates with a power of 62.5W

•  10Ω
•  62.5Ω
•  1/5Ω
•  5Ω

Solution
                             

Q30. A 100 watt bulb working on 200 volt and a 200 watt bulb working on 100 volt have

•  Resistances in the ratio of 4 :1
•  Maximum current ratings in the ratio of 1 :4
•  Resistances in the ratio of 2 :1
• Maximum current ratings in the ratio of 1 :2

Solution