YSA Model Paper 

Subject: Physics                                                                                            Class: X

Answer Key

Section – C

Q.3 a)              m = ?,  E = 1.35 * 10¹⁵J,  C = 3 * 10⁸ m/sec.

                        E = mC²

                        1.35 * 10¹⁵ = m * 9 * 10¹⁶

                       

       b)              Text book Pg # 102.

Q.4 a)              Text book Pg # 71

       b)              Text book Pg # 39

Q.5 a)              Text book Pg # 68

       b)              A.C Generator: It converts mechanical energy into electrical energy.

                        D.C Motor: It changes electrical energy into mechanical energy.

Q.6 a)              Text book Pg # 96 – 97.

       b)              Text book Pg # 104 – 105

 

 

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