Quiz Tweek

Preparing your workspace...

Electric Charges and Fields Quiz Set-3 MCQ Online Practice Test | Class 12 | Quiz Tweek

Electric Charges and Fields Quiz Set-3

Practice Important MCQs for Electric Charges and Fields — Physics, Class 12.

Enhance your preparation for the CBSE Class 12 Physics board exam with this comprehensive quiz on Chapter 1: Electric Charges and Fields. This quiz covers key concepts adhering to the latest NCERT syllabus, including Coulomb's Law, Electric Dipoles, Gauss's Law, and Electric Flux. It features a mix of conceptual Multiple Choice Questions (MCQs) and numerical problem-solving exercises designed to mirror the difficulty and format of actual board questions and Previous Year Questions (PYQs). Perfect for self-assessment, this test helps students identify weak areas in electrostatics and solidify their understanding of fundamental laws governing static charges. Practice these high-probability questions to boost your confidence and score higher in your physics term exams and competitive entrance tests like JEE and NEET.

Minutes

Questions

1 / -0

Marking

Question Bank Preview

Q1. Which of the following statements is true regarding the quantization of electric charge?

(A)

Charge can exist in fractions of electron charge.

(B)

The total charge of an isolated system is not conserved.

(C)

Charge always exists as an integral multiple of the fundamental charge $e$ .

(D)

Quantization of charge is only valid for microscopic charges.

Q2. Two point charges $+3\mu C$ and $+4\mu C$ repel each other with a force of $10 N$ . If each is given an additional charge of $-6\mu C$ , the new force will be:

(A)

$2 N$ (attractive)

(B)

$2 N$ (repulsive)

(C)

$4 N$ (repulsive)

(D)

$4 N$ (attractive)

Q3. The electric flux through a closed surface enclosing an electric dipole is:

(A)

$\frac{q}{\epsilon_0}$

(B)

$\frac{2q}{\epsilon_0}$

(C)

Zero

(D)

Infinite

Q4. An electric dipole of dipole moment $\vec{p}$ is placed in a uniform electric field $\vec{E}$ . The torque $\vec{\tau}$ acting on it is given by:

(A)

$\vec{\tau} = \vec{p} \cdot \vec{E}$

(B)

$\vec{\tau} = \vec{p} \times \vec{E}$

(C)

$\vec{\tau} = \vec{E} \times \vec{p}$

(D)

$\vec{\tau} = pE$

Q5. Which of the following graphs correctly represents the variation of electric field $E$ due to a uniformly charged infinite plane sheet with distance $r$ from it?

(A)

$E \propto r$

(B)

$E \propto 1/r$

(C)

$E \propto 1/r^2$

(D)

$E$ is independent of $r$

Q6. A charge $q$ is placed at the center of a cube of side $L$ . The electric flux emerging from the cube is:

(A)

$\frac{q}{\epsilon_0}$

(B)

$\frac{q}{6\epsilon_0}$

(C)

$\frac{6qL^2}{\epsilon_0}$

(D)

$\frac{q}{8\epsilon_0}$

Q7. The SI unit of electric flux is:

(A)

$N C^{-1} m^{-2}$

(B)

$N C m^{-2}$

(C)

$N m^2 C^{-1}$

(D)

$N m^{-2} C$

Q8. If the distance between two point charges is doubled, the electrostatic force between them becomes:

(A)

Four times

(B)

Two times

(C)

One-fourth

(D)

Halved

Q9. An electron enters a uniform electric field with an initial velocity perpendicular to the field lines. The trajectory of the electron is:

(A)

Straight line

(B)

Circular

(C)

Parabolic

(D)

Elliptical

Q10. Four charges are placed at the corners of a square ABCD. The charge at A is $+q$ , at B is $+2q$ , at C is $-q$ , and at D is $-2q$ . The direction of the electric field at the center of the square is along:

(A)

(B)

(C)

(D)

Q11. What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line?

(A)

$0^\circ$

(B)

$90^\circ$

(C)

$180^\circ$

(D)

$45^\circ$

Q12. A hollow metal sphere of radius $R$ is uniformly charged. The electric field at a distance $r$ ( $r < R$ ) from the center is:

(A)

Zero

(B)

Non-zero constant

(C)

Proportional to $r$

(D)

Inversely proportional to $r^2$

Q13. Two charges $q_1$ and $q_2$ are placed in vacuum at a distance $d$ and the force acting between them is $F$ . If a medium of dielectric constant $K=4$ is introduced around them, the force will be:

(A)

$4F$

(B)

$2F$

(C)

$F/2$

(D)

$F/4$

Q14. The electric field intensity due to a short dipole at a distance $r$ along the axial line is $E_a$ and along the equatorial line is $E_e$ . The relation between them is:

(A)

$E_a = E_e$

(B)

$E_a = 2E_e$

(C)

$E_e = 2E_a$

(D)

$E_a = 4E_e$

Q15. A point charge $+10 \mu C$ is at a distance 5 cm directly above the center of a square of side 10 cm. The magnitude of the electric flux through the square is:

(A)

$1.88 \times 10^5 N m^2 C^{-1}$

(B)

$1.88 \times 10^4 N m^2 C^{-1}$

(C)

$1.88 \times 10^6 N m^2 C^{-1}$

(D)

Zero

...and 5 more challenging questions available in the interactive simulator.

More Quizzes for Class 12

Explore other chapters and subjects, or view all quizzes for this class.

Quiz Tweek

Electric Charges and Fields Quiz Set-3

Question Bank Preview

More Quizzes for Class 12

Chemistry

Mathematics

Physics

Frequently Asked Questions

What specific topics does this Class 12 Physics quiz cover?

Are these questions suitable for CBSE Board exam preparation?

What is the difficulty level of this Physics quiz?

Can this quiz help with JEE or NEET preparation?

Does the quiz include numerical problems?