CBSE Class 10 Physics Solutions | Quick Revision Guide

 Top Scoring CBSE Class 10 Physics Solutions You Need

Looking to ace your CBSE Class 10 Physics exam? In this post, the idea is to bring top-scoring solutions to the most common and tricky questions from chapters like Light, Electricity, and Magnetic Effects of Current. Watch the solutions of the problems in the post in the video till the end for exam tips and tricks to maximize your marks!

1. A student wants to obtain an erect image of an object using a concave mirror of 10 cm focal length.        What will be the distance of the object from mirror?

     a) Less than 10 cm      

     b) 10 cm      

     c) between 10 cm and 20 cm      

     d) more than 20 cm

2. In the following diagram, the position of the needle is shown on the scale of a voltmeter. The least   
    count of the voltmeter and the reading shown by it respectively are:

     a) 0.15 V and 1.6 V    

     b) 0.05 V and 1.6 V    

     c) 0.15 V and 1.8 V   

     d)  0.05 V and 1.8 V

3. In the following diagram showing dispersion of white light by a glass prism, the colors 'P' and 'Q'
     respectively are-

     

    a) Red and Violet        

    b) Violet and Red       

    c) Red and Blue          

    d) Orange and Green

4. The magnetic field inside a long straight current carrying solenoid:

    a) is zero

    b) decreases as we move towards its end.

    c) increases as we move towards its end.

    d) is same at all points.

5. The resistance of a resistor is reduced to half of its initial value. If other parameter of the electrical
    circuit remains unaltered, the amount of heat produced in the resistor will become:

    a) four times    

    b) two times    

    c) half  

    d) one fourth

6. If four identical resistor of resistance 8 ohm, are first connected in series so as to give an effective
   resistance Rs, and then connected in parallel so as to give an effective resistance Rp, then the ratio
   Rs/Rp is -

   a) 32    

   b) 2      

   c) 0.5   

   d) 16

Assertion-and-Reason Type

Each question consists of two statements, namely, Assertion (A) and Reason (R).For selecting the correct answer, use the following code:

(a) Both Assertion (A) and Reason (R) are the true and Reason (R) is a correct explanation of Assertion        (A).

(b) Both Assertion (A) and Reason (R) are the true but Reason (R) is not a correct explanation of     
      Assertion (A).

(c) Assertion (A) is true and Reason (R) is false.

(d) Assertion (A) is false and Reason (R) is true.

1. Assertion (A): A current carrying straight conductor experiences a force when placed perpendicular
     to the direction of magnetic field.

    Reason (R): The net charge on a current carrying conductor is always zero.

Answer: b

2. Assertion (A): Two magnetic field lines around a current carrying straight wire do not intersect each
    other.

    Reason (R): The magnitude of the magnetic field produced at a given point increases as the current
    through the wire increases.

Answer: b

Analytical Questions

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