Electromagnetic Induction & Alternating Currents (NEST (National Entrance Screening Test) Physics): Questions 1 - 1 of 3

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Question number: 1

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 2007

MCQ▾

Question

A flexible conducting wire of rectangular shape Equation of sides Equation and Equation , lies in the Equation plane. There is a uniform magnetic field along the Equation . The wire is deformed continuously in the same plane from shape Equation to another rectangular shape Equation of sides Equation and Equation . Let Equation denote the magnetic flux through the loop. Then, independent of how the loop is deformed –

Segment d Segment d: Segment [D, E] of Quadrilateral poly1Segment e Segment e: Segment [E, F] of Quadrilateral poly1Segment f Segment f: Segment [F, G] of Quadrilateral poly1Segment g Segment g: Segment [G, D] of Quadrilateral poly1Segment d_1 Segment d_1: Segment [D_1, E_1] of Quadrilateral poly1_1Segment e_1 Segment e_1: Segment [E_1, F_1] of Quadrilateral poly1_1Segment f_1 Segment f_1: Segment [F_1, G_1] of Quadrilateral poly1_1Segment g_1 Segment g_1: Segment [G_1, D_1] of Quadrilateral poly1_1Vector u Vector u: Vector [A, B] Vector u Vector u: Vector [A, B] Vector v Vector v: Vector [A, C] Vector v Vector v: Vector [A, C] Vector u_1 Vector u_1: Vector [A_1, B_1] Vector u_1 Vector u_1: Vector [A_1, B_1] Vector v_1 Vector v_1: Vector [A_1, C_1] Vector v_1 Vector v_1: Vector [A_1, C_1] X text1 = “X”Y text1_1 = “Y”Y text1_2 = “Y”X text1_3 = “X” (P) text2 = ” (P) “ (P) text2 = ” (P) “ (P) text2 = ” (P) “ (Q) text2_1 = ” (Q) “ (Q) text2_1 = ” (Q) “ (Q) text2_1 = ” (Q) “a text2_2 = “a”b text2_3 = “b”b text2_4 = “b”a text2_5 = “a”

Wire Loops in Magnetic Field

In figure, a flexible conducting wire of rectangular shape of sides a and b lies in xy plane.

Choices

Choice (4) Response

a.

Equation is constant throughout the process.

b.

There is no heat generated in the entire process.

c.

The net charge flowing through the wire in the entire process is zero.

d.

Since Equation , there is no induced emf in the wire at any time.

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