Question

# The figure shows four wire loops, with edge lengths of either L or 2L. All four loops will move through a region of uniform magnetic field (directed out of the page) at the same constant velocity. Rank the four loops according to the maximum magnitude of the e.m.f. induced as they move through the field, greatest first

## The correct answer is:

### Emf induces across the length of the wire which cuts the magnetic field. (Length of c = Length d) > (Length of a = b). So >

### Related Questions to study

### A magnet is made to oscillate with a particular frequency, passing through a coil as shown in figure. The time variation of the magnitude of e.m.f. generated across the coil during one cycle is

### A magnet is made to oscillate with a particular frequency, passing through a coil as shown in figure. The time variation of the magnitude of e.m.f. generated across the coil during one cycle is

### A square loop of side 5 cm enters a magnetic field with 1 cms^{-1}. The front edge enters the magnetic field at t = 0 then which graph best depicts emf

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### When a certain circuit consisting of a constant e.m.f. E an inductance L and a resistance R is closed, the current in, it increases with time according to curve 1. After one parameter (E, L or R) is changed, the increase in current follows curve 2 when the circuit is closed second time. Which parameter was changed and in what direction

### When a certain circuit consisting of a constant e.m.f. E an inductance L and a resistance R is closed, the current in, it increases with time according to curve 1. After one parameter (E, L or R) is changed, the increase in current follows curve 2 when the circuit is closed second time. Which parameter was changed and in what direction

### In the following figure, the magnet is moved towards the coil with a speed v and induced emf is e. If magnet and coil recede away from one another each moving with speed v, the induced emf in the coil will be

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in a right angled isosceles triangle, ratio of sides = 1:√2:1

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### The equation . where a, b, c are the sides of a ΔABC, and the equation have a common root. The measure of is-

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base angles are = 45 degrees.

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the sine rule states that

a/sin A =b/sin B = c/sinC = 2R

this is used to find the relation of the angles and sides of the triangles.

### In the adjacent figure 'P' is any interior point of the equilateral triangle ABC of side length 2 unit –

If xa, xb and xc represent the distance of P from the sides BC, CA and AB respectively then xa + xb + xc is equal to -

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area of triangle = 1/2 x base x height

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sum of interior angles of a triangle = 180 degree

### Statement- (1) : The tangents drawn to the parabola y^{2} = 4ax at the ends of any focal chord intersect on the directrix.

Statement- (2) : The point of intersection of the tangents at drawn at P(t_{1}) and Q(t_{2}) are the parabola y^{2} = 4ax is {at_{1}t_{2}, a(t_{1} + t_{2})}

### Statement- (1) : The tangents drawn to the parabola y^{2} = 4ax at the ends of any focal chord intersect on the directrix.

Statement- (2) : The point of intersection of the tangents at drawn at P(t_{1}) and Q(t_{2}) are the parabola y^{2} = 4ax is {at_{1}t_{2}, a(t_{1} + t_{2})}

### Statement- (1) : PQ is a focal chord of a parabola. Then the tangent at P to the parabola is parallel to the normal at Q.

Statement- (2) : If P(t_{1}) and Q(t_{2}) are the ends of a focal chord of the parabola y^{2} = 4ax, then t_{1}t_{2} = –1.

slopes at the two extremeties of a focal chord are : (t,-1/t)

this property is used to explain the behaviour of tangents and normals at the respective points.

### Statement- (1) : PQ is a focal chord of a parabola. Then the tangent at P to the parabola is parallel to the normal at Q.

Statement- (2) : If P(t_{1}) and Q(t_{2}) are the ends of a focal chord of the parabola y^{2} = 4ax, then t_{1}t_{2} = –1.

slopes at the two extremeties of a focal chord are : (t,-1/t)

this property is used to explain the behaviour of tangents and normals at the respective points.