(Download) CBSE Class-12 Sample Paper 2021-22 : Physics

Sample Question Paper (Term-1) 2021-22

Subject Name : Physics

Subject Code: 042

Time Allowed: 90

Minutes Maximum Marks: 35

Q1.Which of the following is NOT the property of equipotential surface?
 (i) They do not cross each other.
 (ii) The rate of change of potential with distance on them is zero.
 (iii) For a uniform electric field they are concentric spheres.
 (iv) They can be imaginary spheres.
Q2. Two point charges +8q and -2q are located at x=0 and x=L respectively.
 The point on x axis at which net electric field is zero due to these charges is-
(i) 8L
(ii) 4L
(iii) 2 L
(iv) L 
Q3. An electric dipole of moment p is placed parallel to the uniform electric field. The amount of work done in rotating the dipole by 900 is-
 (i) 2pE
 (ii) pE
 (iii) pE/2
 (iv) Zero
Q4. Three capacitors 2µF, 3µF and 6µF are joined in series with each other.
 The equivalent capacitance is-
 (i) 1/2µF
 (ii) 1µF
 (iii) 2µF
 (iv) 11µF
Q5. Two point charges placed in a medium of dielectric constant 5 are at a distance r between them, experience an electrostatic force ‘F’. The electrostatic force between them in vacuum at the same distance r will be-
(i) 5F
 (ii) F
 (iii) F/2
 (iv) F/5
Q6. Which statement is true for Gauss law-
 (i) All the charges whether inside or outside the gaussian surface contribute to  the electric flux.
 (ii) Electric flux depends upon the geometry of the gaussian surface.
 (iii) Gauss theorem can be applied to non-uniform electric field.
 (iv) The electric field over the gaussian surface remains continuous and uniform at every point. 

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