Current Electricity Quiz-16

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. .

Q1. In the given figure, battery E is balanced on 55 cm length of potentiometer wire but when a resistance of 10 Ω is connected in parallel with the battery then it balances on 50 cm length of the potentiometer wire then internal resistance r of the battery is?

  •  1 Ω
  •  3 Ω
  •  10 Ω
  •  5 Ω
r=((l1-l2)/l2 )×R'⇒r=((55-50)/50)×10=1Ω

Q2. Which statement is true? (i) Kirchoff’s law is equally applicable to both AC and DC. (ii) Semiconductors have a positive temperature coefficient of resistance. (iii) Meter bridge is greater sensitive when the resistance of all four arms of the bridge is of the same order. (iv) The emf of a cell depends upon the size and area of electrodes.
  •  (i) and (iv)
  •  (ii) and (iv)
  •  (iii) and (iv)
  •  None of these
In a potentiometer there is no current drawn from the cell whose emf is to be measured whereas a voltmeter always draws some current from the cell. Hence, the emf of a cell can be measured accurately using a potentiometer.

Q3. An electric iron draws 5 amp, a TV set draws 3 amp and refrigerator graws 2 amp from a 220 volt main line. The three appliances are connected in parallel. If all the three are operating at the same time, the fuse used may be of?
  •  20 amp
  •  5 amp
  •  15 amp
  •  10 amp
Current capacity of a fuse wire should be slightly greater than the total rated load current

Q4. The ratio of the amounts of heat developed in the four arms of a balanced Wheatstone bridge, when the arms have resistance P=100 Ω; Q=10 Ω;R=300 Ω and S=30 Ω respectively is?
  •  3 : 30 : 1 : 10
  •  30 : 3 : 10 :1
  •  30 : 10 : 1 : 3
  •  30 : 1 : 3 : 10
Let I be the total current passing through balanced wheat stone bridge. Current through arms of resistances P and Q in series is I1=(I×300)/(330+110)=3/4 I and current through arms of Resistances R and S in series is I2=(I×110)/(330+110)=1/4 I ∴ Ratio of heat developed per sec HP ∶HQ ∶HR ∶HS =(3/4 I)2×100∶(3/4 I)2×10∶(1/4 I)2×300∶(1/4 I)2×30 =30∶3∶10∶1.

Q5. Length of a hollow tube is 5m, it’s outer diameter is 10 cm and thickness of it’s wall is 5 mm. If resistivity of the material of the tube is 1.7×10-8 Ω×m then resistance of tube will be?
  •  5.6×10-5 Ω
  •  2×10-5 Ω
  •  4×10-5 Ω
  •  None of these
 By using R=ρ.l/A;here A=π(r22-r12 ) Outer radius r2=5cm Inner radius r1=5-0.5=4.5 cm 

So R=1.7×10-8×5/(π{(5×10-2 )2-(4.5×10-2 )2}) =5.6×10-5 Ω

Q6. A milliammeter of range 0-30mA has internal resistance of 20 Ω. The resistance to be connected in series to convert it into a voltmeter of maximum reading 3V is?
  •  49 Ω
  •  80 Ω
  •  40 Ω
  •  30 Ω
R= V/Ig -G=3/(30×10-3 )-20=102-20=80Ω

Q7. A lamp having tungsten filament consumes 50 W. Assume the temperature coefficient of resistance for tungsten is 4.5×10-3-1 and temperature of the surrounding is 20℃. When the lamp burns, the temperature of its filament becomes 2500℃ , then the power consumed at the moment switch is on, is?
  •  608 W
  •  710 W
  •  215 W
  •  580 W
Let R0 = resistance of filament at room temperature Rt = resistance of filament at 2500℃ Similarly powers, P0 and Pt. Here, voltage remains the same. P0=V2/R0 or R0=V2/P0 , Rt=V2/Pt also Rt=R0 [1+α(2500-20) ] and P0=Pt [1+α(2500-20)] =50[1+4.5×10-3 (2500-20)] = 608W

Q8. A heater coil cut into two equal parts and one part is connected with heater. Now heat generated in heater will be?
  •  Twice
  •  Half
  •  One-fourth
  •  Four times

Q9. A long straight wire of a circular cross section (radius a) carries a steady current I and the current I is uniformly distributed across this cross-section. Which of the following plots represents the variation of magnitude of magnetic field B with distance r from the centre of the wire?




Magnetic field due to a long straight wire of radius a carrying current I at a point distant r from the centre of the wire is given as follows B=(μ0 Ir)/(2πa2 ) for r less than a B=(μ0 I)/2πr for r=a B=(μ0 I)/2πr for r>a The variation of magnetic field B with distance r from the centre of wire is shown in the figure

Q10. The resistance of a discharge tube is?
  •  Ohmic
  •  Non-ohmic
  •  Both (a) and (b)
  •  Zero
This is because of secondary ionisation which is possible in the gas filled in it

Want to know more

Want to Know More
Please fill in the details below:


Latest IITJEE Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide

Latest NEET Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide


Admissions,1,Alternating Current,60,AP EAMCET 2020,1,Basic Maths,2,BCECE 2020,1,best books for iit jee,2,best coaching institute for iit,1,best coaching institute for iit jee preparation,1,best iit jee coaching delhi,1,best iit jee coaching in delhi,2,best study material for iit jee,4,BITSAT Registration 2020,1,Blog,62,books for jee preparation,1,books recommended by iit toppers,3,Capacitance,3,CBSE,1,CBSE accounts exam,1,CBSE boards,1,CBSE NEET,9,cbse neet 2019,3,CBSE NEET 2020,1,cbse neet nic,1,Centre of Mass,2,Chemistry,58,Class 12 Physics,15,coaching for jee advanced,1,coaching institute for iit jee,2,Collision,2,COMEDK UGET 2020 Application Form,1,COMEDK UGET 2020 Exam Form,1,COMEDK UGET news,1,CUCET 2020,2,Current Electricity,4,CVR college,1,Electromagnetic Induction,3,Electronics,1,Electrostatics,3,Energy,1,Fluid Mechanics,4,Gravitation,2,GUJCET 2020 Application Form,1,Heat,4,iit admission,1,iit advanced,1,iit coaching centre,3,iit coaching centre in delhi,2,iit coaching classes,2,iit coaching in delhi,1,iit coaching institute in delhi,1,iit entrance exam,1,iit entrance exam syllabus,2,iit exam pattern,2,iit jee,5,iit jee 2019,3,iit jee advanced,2,iit jee books,3,iit jee coaching,2,iit jee exam,3,iit jee exam 2019,1,iit jee exam pattern,3,iit jee institute,1,iit jee main 2019,2,iit jee mains,3,iit jee mains syllabus,2,iit jee material,1,iit jee online test,3,iit jee practice test,3,iit jee preparation,6,iit jee preparation in delhi,2,iit jee preparation time,1,iit jee preparation tips by toppers,2,iit jee question paper,1,iit jee study material,3,iit jee study materials,2,iit jee syllabus,2,iit jee syllabus 2019,2,iit jee test,3,iit preparation,2,iit preparation books,5,iit preparation time table,2,iit preparation tips,2,iit syllabus,2,iit test series,3,IITJEE,100,IPU CET,1,JEE Advanced,83,jee advanced exam,2,jee advanced exam pattern,1,jee advanced paper,1,JEE Books,1,JEE Coaching Delhi,3,jee exam,3,jee exam 2019,6,JEE Exam Pattern,2,jee exam pattern 2019,1,jee exam preparation,1,JEE Main,85,jee main 2019,4,JEE Main 2020,1,JEE Main 2020 Application Form,2,JEE Main 2020 news,2,JEE Main 2020 Official Answer Key,1,JEE Main 2020 Registration,1,JEE Main 2020 Score,1,JEE Main application form,1,jee main coaching,1,JEE Main eligibility criteria,3,jee main exam,1,jee main exam 2019,3,jee main online question paper,1,jee main online test,3,JEE Main Paper-2 Result,1,jee main registration,2,jee main syllabus,2,JEE mains 2020,1,jee mains question bank,1,jee mains test papers,3,JEE Mock Test,2,jee notes,1,jee past papers,1,JEE Preparation,2,jee preparation in delhi,1,jee preparation material,4,JEE Study Material,1,jee syllabus,6,JEE Syllabus Chemistry,1,JEE Syllabus Maths,1,JEE Syllabus Physics,1,jee test series,3,KCET - 2020,1,Kinematics,1,Latest article,5,Latest Articles,61,Latest News,34,latest news about neet exam,1,Laws of Motion,2,Magnetic Effect of Current,3,Magnetism,3,MHT CET 2020,2,MHT CET 2020 exam schedule,1,Modern Physics,1,NCERT Solutions,15,neet,3,neet 2019,1,neet 2019 eligibility criteria,1,neet 2019 exam date,2,neet 2019 test series,2,NEET 2020,2,NEET 2020 Application Form,1,NEET 2020 Eligibility Criteria,1,NEET 2020 Registration,1,neet application form,1,neet application form 2019 last date,1,Neet Biology Syllabus,1,Neet Books,3,neet eligibility criteria,3,neet exam 2019,7,neet exam application,1,neet exam date,1,neet exam details,1,neet exam pattern,6,neet exam pattern 2019,2,neet examination,1,neet mock test 2019,1,Neet Notes,3,Neet Online Application Form,3,neet online test,2,neet past papers,1,neet physics syllabus,1,neet practice test,2,NEET preparation books,1,neet qualification marks,1,NEET question paper 2019,1,neet question papers,1,neet registration,1,Neet Study Material,3,neet syllabus,6,neet syllabus 2019,5,NEET Syllabus 2020,1,neet syllabus chemistry,1,neet syllabus for biology,1,neet syllabus for physics,1,neet test series,1,neet ug 2019,2,news,5,online study material for iit jee,1,Optical Instruments,1,Physics,110,physics books for iit jee,1,Power,1,Practical Physics,1,Quiz,5,Ray Optics,1,Rotational Motion,3,SHM,3,Simple Harmonic Motion,3,study materials for iit jee,1,Study Notes,110,study notes for iit jee,1,Thermodynamics,4,TS EAMCET Notification,2,Units and Dimensions,1,UPSEE 2020,1,UPSEE 2020 Application Form,2,UPSEE EXAM,1,Vectors,2,VITEE Application form,1,Wave Motion,3,Wave Optics,1,WBJEE 2020 Admit Card,1,WBJEE 2020 Answer Key,1,Work,1,
Current Electricity Quiz 16
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy