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Electromagnetic induction Chapter 6 Physics Class 12th JAC Board 2022 1st term exam Q1. Lenz's law is associated with law of conservation of a) charge b)mass c) energy d) length Q2. What is unit of self induction? a) Henry b) Weber c)Ohm d) Newton Q3. The magnetic flux (∅) linked with a coil is related to its area as:- a) ∅ ∝ A² b)∅∝A c) ∅ ∝ A³ d)∅∝A⁴ Q4. The electromagnetic induction , the induced charge is independent of:- a) change of flux b) time c) resistance of the coil d) None Q5.The cause of induced emf is:- a) magnetic field b) magnetic flux c) area d) change in magnetic flux Q6. Self induction is also known as inertia of a) magnetic field b) Electric flux c) electricity d) None Q7. Dynamo is based on the principle of:- a) self induction b) mutual induction c) Electromagnetic Induction d)none Q8. The role of inductance is equivalent to:- a) Inertia b) force c) energy d) Momentum Q9. The number of turns in a coil is doubled then its self inductance will be:- a) doubled b) half c) four times d) unchanged Q10. Transformer works on the principle of:- a) converter b) mutual induction c) self induction d) None Q11. In step up transformer the number of turns in the primary and secondary coils are respectively N₁ and N₂ are:- a) N₁>N₂ b) N₁<N₂ c) N₁=N₂ d) N₂=0 Q12. The unit of inductance is:- a) Newton b) Gauss c) Weber. d) Henry Q13. An inductor may store energy in its:- a) Electric flux b) coil c) magnetic field d) None Q14. The energy lost due to heat produced in the core of transformer is called____________. a) Iron loss b) Copper loss c) flux loss d) Hysteresis Q15. EMF stands for:- a) Electromagnetic flux b) Electromagnetic forward c) electromotive force d) None

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Electromagnetic induction chapter 6 physics part 1

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