Samacheer Kalvi EM 12 Physics Vol1 Unit1 MCQs Mock Test

12th Physics - Volume 1 Mock Test

Unit 1: Electrostatics

Choose the correct answer from the multiple choices, then click "Next" to goto next question and click "OK" after seeing the score.

 

1. Two identical point charges of magnitude -q are fixed as shown in the figure below. A third charge +q is placed midway between the two charges at the point P. Suppose this charge +q is displaced a small distance from the point P in the directions indicated by the arrows, in which direction(s) will +q be stable with respect to the displacement?
   
   
   1.   A₁ and A₂
   2.   B₁ and B₂
   3.   Both directions
   4.   No stable
2. Which charge configuration produces a uniform electric field?
   1.   Point charge
   2.   Infinite uniform line charge
   3.   Uniformly charged infinite plane
   4.   Uniformly charged spherical shell
3. What is the ratio of the charges `\|\frac{q_1}{q_2}\|` for the following electric field line pattern?
   
   
   1.   1/5
   2.   25/11
   3.   5
   4.   11/25
4. An electric dipole is placed at an alignment angle of 30° with an electric field of `2\times10^5\NC^{-1}`. It experiences a torque equal to 8 N m. The charge on the dipole if the dipole length is 1 cm is-
   1.   4 mC
   2.   8 mC
   3.   5 mC
   4.   7 mC
5. Four Gaussian surfaces are given below with charges inside each Gaussian surface. Rank the electric flux through each Gaussian surface in increasing order.
   
   
   1.   D < C < B < A
   2.   A < B=C < D
   3.   C < A=B < D
   4.   D > C > B > A
6. The total electric flux for the following closed surface which is kept inside water
   
   
   1.   `\frac{80q}{\varepsilon_0}`
   2.   `\frac q{40\varepsilon_0}`
   3.   `\frac q{80\varepsilon_0}`
   4.   `\frac q{160\varepsilon_0}`
7. Two identical conducting balls having positive charges q₁ and q₂ are separated by a center to center distance r. If they are made to touch each other and then separated to the same distance, the force between them will be - (NSEP 04-05)
   1.   Less than before
   2.   Same as before
   3.   More than before
   4.   Zero
8. Rank the electrostatic potential energies for the given system of charges in increasing order
   
   
   1.   1=4 < 2 < 3
   2.   2=4 < 3 < 1
   3.   2=3 < 1 < 4
   4.   3 < 1 < 2 < 4
9. An electric field `\vec E`=`10x\hat i` exists in a certain region of space. Then the potential difference V=V_o - V_A, Where V_o is the potential at the origin and V_A is the potential at x=2 m is-
   1.   10 J
   2.   -20 J
   3.   + 20 J
   4.   – 10 J
10. A thin conducting spherical shell of radius R has a charge Q which is uniformly distributed on its surface. The correct plot for electrostatic potential due to this spherical shell is-
    1.   
    2.   
    3.   
    4.   
11. Two points A and B are maintained at a potential of 7 V and -4 V respectively. The work done in moving 50 electrons from A to B is-
    1.   `8.80 \times10^{-17}J`
    2.   `-8.80 \times10^{-17}J`
    3.   `4.40 \times10^{-17}J`
    4.   `5.80 \times10^{-17}J`
12. If voltage applied on a capacitor is increased from V to 2V, choose the correct conclusion.
    1.   Q remains the same, C is doubled
    2.   Q is doubled, C doubled
    3.   C remains same, Q doubled
    4.   Both Q and C remain same
13. A parallel plate capacitor stores a charge Q at a voltage V. Suppose the area of the parallel plate capacitor and the distance between the plates are each doubled then which is the quantity that will change?
    1.   Capacitance
    2.   Charge
    3.   Voltage
    4.   Energy density
14. Three capacitors are connected in triangle as shown in the figure. The equivalent capacitance between the points A and C is
    
    
    1.   1 μF
    2.   2 μF
    3.   3 μF
    4.   1/4 μF
15. Two metallic spheres of radii 1 cm and 3 cm are given charges of `-1 \times10^{-2}C` and `5 \times10^{-2}C` respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is (AIIPMT 2012)
    1.   `3 \times10^{-2}C`
    2.   `4 \times10^{-2}C`
    3.   `1 \times10^{-2}C`
    4.   `2 \times10^{-2}C`

Samacheer Kalvi EM 12th Std Physics Vol1 Unit1 MCQs Mock Test Instructions

Unit 1: Electrostatics

Here you will find 15 MCQs questions and options. Read the questions carefully and select the appropriate answer for the question by selecting/clicking the box before the option. A pop-up box will open by displaying the result of the option selected. The result of each question will be based on percentages. Each question will have 3 chances to select the right option and for every chance, the percentage of scores will be reduced. Likewise, the remaining questions also take place. The overall percentage scored will be displayed at the completion of the mock test.

Note: Every time the page loads, the question and options will be randomized and takes you to the beginning of the particular exercise.

Button Navigations:

The Below Image shows the button navigations.

• The Home Button On the Top and Bottom Navigates to the Homepage of the Subject (Example: To Physics if the mock test is taken from Physics).
• The Next Unit Button on the Top and Bottom Navigates to the Next Unit (Example: From Unit 1 to Unit 2 and so on).
• The Goto Subjects Button on the Top and Bottom Navigates to the 12th Std subject list (Example: From MCQs to 12th Std subject list and so on).
• The Next Button next to the question numbers Navigates to the Next Question (Example: From 1 to 2 and so on).
• The Show All Questions Button Displays all the questions and options of that exercise on a single page.
• The Option Box Icon (Box with Question mark icon), is the box that is to be selected for the correct option. By selecting/clicking the option box, a pop-up box will open by displaying the result of the option selected.