CBSE Class 12 Physics Electric Charges And Fields Worksheet Set C

Read and download free pdf of CBSE Class 12 Physics Electric Charges And Fields Worksheet Set C. Students and teachers of Class 12 Physics can get free printable Worksheets for Class 12 Physics Chapter 1 Electric Charges And Fields in PDF format prepared as per the latest syllabus and examination pattern in your schools. Class 12 students should practice questions and answers given here for Physics in Class 12 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 12 Physics Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems with solutions on daily basis to get more score in school exams and tests

Worksheet for Class 12 Physics Chapter 1 Electric Charges And Fields

Class 12 Physics students should refer to the following printable worksheet in Pdf for Chapter 1 Electric Charges And Fields in Class 12. This test paper with questions and answers for Class 12 will be very useful for exams and help you to score good marks

Class 12 Physics Worksheet for Chapter 1 Electric Charges And Fields

CBSE Class 12 Physics Electric Charges and Fields.Students can download these worksheets and practice them. This will help them to get better marks in examinations. Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects. 

SECTION A

CONCEPTUAL AND APPLICATION TYPE QUESTIONS

1 Is the force acting between two point charges q1 and q2 kept at some distance apart in air attractive or repulsive when i) q1 q2 > 0 ii) q1 q2 < 0 ?

2 If the distance between two equal point charges is doubled and their individual charges are also doubled ,what would happen to the force between them ?

3 Do the electrostatic field lines form closed loops?

4 A hollow metal sphere of radius 5cm is charged such that the potential on its is 10V. What is the electric field at the centre of the sphere?

5 What is meant by the statement that “the electric field of a point charge has spherical symmetry whereas electric field due to an electric dipole is cylindrically symmetrical’’ ?

Important Questions for NCERT Class 12 Physics Electric Charges And Fields

Question. A body can be negatively charged by : 
(a) removing some neutrons from it
(b) giving excess electrons to it
(c) removing some protons from it
(d) removing some electrons from it

Answer   B

Question. The number of electrons for one coulomb of charge are: 
(a) 6.25 × 1023
(b) 6.25 × 1021
(c) 6.25 × 1018
(d) 6.25 × 1019

Answer   C

Question. What is the electric flux associated with one of faces of a cube, when a charge (q) is enclosed in the cube ? 
(a) 6q/ε0
(b) q/6ε0
(c) q/3ε0
(d) 3q/ε0

Answer   B

Question. The point charges Q and –2Q are placed at some distance apart. If the electric field at the location of Q is E. The electric field at the location of Q is E. The electric field at the location of –2Q will be 
(a) - 3E/2
(b) – E
(c) - E/2
(d) -2E

 

Answer  C

Question. How many electrons make up a charge of 20 μC. 
(a) 1.25 × 1014
(b) 2.23 × 1014
(c) 3.25 × 1014
(d) 5.25 × 1014

Answer   A

Question. Let Ea be the electric field due to a dipole in its axial plane distant l and Eq be the field in the equatorial plane distant l', then the relation between Ea and Eq will be : 
(a) Ea = 4Eq
(b) Eq = 2Ea
(c) Ea = 2Eq
(d) Eq = 3Ea

Answer  C

Question. A particle of mass 2g and charge 1mC is held at a distance of 1m from a fixed charge 1mC. If the particle is released it will be repelled. The speed of particle when it is at a distance of 10 metre from the fixed charge is 
(a) 90 m/s
(b) 100 m/s
(c) 45 m/s
(d) 55 m/s

Answer   A

Question. A conducting sphere of radius 10 cm is charged with 10 μC. Another uncharged sphere of radius 20 cm is allowed to touch it for some time. After that if the spheres are separated, then surface density of charges on the spheres will be in the ratio of   
(a) 1 : 1
(b) 2 : 1
(c) 1 : 3
(d) 4 : 1

Answer  B

Question. An electric dipole placed in a non-uniform electric field experiences :   
(a) both, a torque and a net force
(b) only a force but no torque
(c) only a torque but no net force
(d) no torque and no net force

Answer  A

Question. Two infinitely long parallel conducting plates having surface charge densities +s and –s respectively, are separated by a small distance.
The medium between the plates is vacuum. If ε0 is the dielectric permittivity of vacuum then the electric field in the region between the plates is : 
(a) 0 volt/m
(b) s/ 2ε0 volt/m
(c) s/ ε0 volt/m
(d) 2s / ε0 volt/m

Answer  C

Question. Two parallel large thin metal sheets have equal surface charge densities (s = 26.4 × 10–12 c/m2) of opposite signs. The electric field between these sheets is : 
(a) 1.5 N/C
(b) 1.5´10-10N/C
(c) 3 N/C
(d) 3´10-10N/C

Answer  C

Question. Three charge q, Q and 4q are placed in a straight line of length l at points distant 0, 1/2 and l respectively from one end. In order to make the net froce on q zero, the charge Q must be equal to   
(a) –q
(b) – 2q
(c) -q/2
(d) q

Answer   A

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CBSE Class 12 Physics Chapter 1 Electric Charges And Fields Worksheet

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