luced A square loop enters a magnetic field with velocity v as shown in figure...

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Physics

luced A square loop enters a magnetic field with velocity v as shown in figure The front edge enters the magnetic field at time t 0 Which of the following graphs gives the correct variation of emf e induced in the loop with time t for its constant velocity in the magnetic field 1 3 1 2 A D t s 2 P t s 4 A rectangular metal loop ABCD is passed through ne magnetic field with a constant velocity v Which of the following represents power P vs time t graph B C V X X X X of dip is 45 B X t s t s X X X X X X X X X X 53 4 Self inductance of a solenoid is 5 mH If current is decreasing through it at the rate 103 A s then emf induced in the solenoid is 1 5 V 2 5 V 3 2 5 V 4 2 5 V Keeping number of turns constant self inductance L of a solenoid varies with its length las 1 LI 2 Lax 3 La R La 7 12 2 4 La b A conducting rod AC of length 41 is rotated with angular velocity w about a point O in a uniform magnetic field B directed into the plane of the paper If AO 1 and OC 31 then potential difference between A and C V Vis X x x X x x Ax X x S se X X X O X X x v X x X X X x 1 2Bw 2 Bw 3 3Bw 4 4Bw Tower 8 Pusa Road New Delhi 110005 Ph

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Lets go through each question one by one Question 1 Square Loop in a Magnetic Field When a square loop enters a magnetic field with a constant velocity v the induced electromotive force emf e is related to the change in magnetic flux Phi through the loop According to Faradays law of electromagnetic induction e fracdPhidt As the loop enters and exits the magnetic field the flux changes See Answer

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