Physics-
General
Easy

Question

The magnetic flux across a loop of resistance 10 capital omega is given by ϕ equals 5 t to the power of 2 end exponent minus 4 t plus 1 blank w e b e r. How much current is induced in the loop after 0.2 sec

  1. 0.4 blank A  
  2. 0.2 blank A  
  3. 0.04 blank A  
  4. 0.02 blank A  

The correct answer is: 0.2 blank A


    Magnetic flux, ϕ equals 5 t to the power of 2 end exponent minus 4 t plus 1 blank W b
    therefore fraction numerator d ϕ over denominator d t end fraction equals 10 t minus 4 blank W b blank s to the power of negative 1 end exponent
    The induced emf is epsilon equals fraction numerator negative d ϕ over denominator d t end fraction equals negative open parentheses 10 t minus 4 close parentheses
    At, t equals 0.2 blank S comma blank epsilon equals negative open parentheses 10 cross times 0.2 minus 4 close parentheses equals 2 V
    The induced current is I equals fraction numerator epsilon over denominator R end fraction equals fraction numerator 2 V over denominator 10 capital omega end fraction equals 0.2 blank A

    Related Questions to study

    General
    Physics-

    A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere with part of the loop outside the field, as shown in figure. The induced emf is

    A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere with part of the loop outside the field, as shown in figure. The induced emf is
    Physics-General

    General
    Physics-

    At a place the value of horizontal component of the earth’s magnetic field His 3 cross times 10 to the power of negative 5 end exponent w e b e r divided by m to the power of 2 end exponent. A metallic rod A B of length 2 blank m placed in east-west direction, having the end A towards east, falls vertically downward with a constant velocity of 50 blank m divided by s. Which end of the rod becomes positively charged and what is the value of induced potential difference between the two ends

    At a place the value of horizontal component of the earth’s magnetic field His 3 cross times 10 to the power of negative 5 end exponent w e b e r divided by m to the power of 2 end exponent. A metallic rod A B of length 2 blank m placed in east-west direction, having the end A towards east, falls vertically downward with a constant velocity of 50 blank m divided by s. Which end of the rod becomes positively charged and what is the value of induced potential difference between the two ends

    Physics-General
    General
    Physics-

    A rectangular, a square, a circular and an elliptical loop, all in the left parenthesis x minus y right parenthesis plane, are moving out of a uniform magnetic field with a constant velocity stack V with rightwards arrow on top equals v blank stack i with rightwards arrow on top. The magnetic field is directed along the negative z-axis direction. The induced e m f, during the passage of these loops, out of the field region, will not remain constant for

    A rectangular, a square, a circular and an elliptical loop, all in the left parenthesis x minus y right parenthesis plane, are moving out of a uniform magnetic field with a constant velocity stack V with rightwards arrow on top equals v blank stack i with rightwards arrow on top. The magnetic field is directed along the negative z-axis direction. The induced e m f, during the passage of these loops, out of the field region, will not remain constant for

    Physics-General
    parallel
    General
    Physics-

    The armature of dc motor has 20 capital omega resistance. It draws current of 1.5 ampere when run by 220 blank v o l t s dc supply. The value of back e.m.f. induced in it will be

    The armature of dc motor has 20 capital omega resistance. It draws current of 1.5 ampere when run by 220 blank v o l t s dc supply. The value of back e.m.f. induced in it will be

    Physics-General
    General
    Physics-

    The oscillating frequency of a cyclotron is 10 MHz. If the radius of its dees is 0.5 m, the kinetic energy of a proton, which is accelerated by the cyclotron is

    The oscillating frequency of a cyclotron is 10 MHz. If the radius of its dees is 0.5 m, the kinetic energy of a proton, which is accelerated by the cyclotron is

    Physics-General
    General
    Physics-

    The flux linked with circuit is given byϕ equals t to the power of 3 end exponent plus 3 t minus 7. The graph between time left parenthesis x minus a x i s right parenthesis and induced emf left parenthesis y minus a x i s right parenthesis will be a

    The flux linked with circuit is given byϕ equals t to the power of 3 end exponent plus 3 t minus 7. The graph between time left parenthesis x minus a x i s right parenthesis and induced emf left parenthesis y minus a x i s right parenthesis will be a

    Physics-General
    parallel
    General
    Maths-

    For the curve y to the power of n end exponent equals a to the power of n minus 1 end exponent x if the subnormal at any point is a constant, then n is equal to

    For the curve y to the power of n end exponent equals a to the power of n minus 1 end exponent x if the subnormal at any point is a constant, then n is equal to

    Maths-General
    General
    Maths-

    The maximum slope of the curve y equals negative x to the power of 3 end exponent plus 3 x to the power of 2 end exponent plus 2 x minus 27 is

    The maximum slope of the curve y equals negative x to the power of 3 end exponent plus 3 x to the power of 2 end exponent plus 2 x minus 27 is

    Maths-General
    General
    Maths-

    The point at which the tangent to the curve y equals 2 x to the power of 2 end exponent minus x plus 1 is parallel to y equals 3 x plus 9, will be

    The point at which the tangent to the curve y equals 2 x to the power of 2 end exponent minus x plus 1 is parallel to y equals 3 x plus 9, will be

    Maths-General
    parallel
    General
    Maths-

    If a differentiable function f left parenthesis x right parenthesis has a relative minimum at x equals 0, then the function ϕ open parentheses x close parentheses equals f open parentheses x close parentheses plus a x plus b has a relative minimum at x equals 0 for

    If a differentiable function f left parenthesis x right parenthesis has a relative minimum at x equals 0, then the function ϕ open parentheses x close parentheses equals f open parentheses x close parentheses plus a x plus b has a relative minimum at x equals 0 for

    Maths-General
    General
    Maths-

    Let f left parenthesis x right parenthesis and g left parenthesis x right parenthesis be differentiable for 0 less or equal than x less or equal than 1 comma such that f open parentheses 0 close parentheses equals 2 comma g open parentheses 0 close parentheses equals 0 comma f open parentheses 1 close parentheses equals 6. Let there exist a real number c in open square brackets 0 comma blank 1 close square brackets such that f to the power of ´ end exponent open parentheses c close parentheses equals 2 g to the power of ´ end exponent open parentheses c close parentheses comma then the value of g left parenthesis 1 right parenthesis must be

    Let f left parenthesis x right parenthesis and g left parenthesis x right parenthesis be differentiable for 0 less or equal than x less or equal than 1 comma such that f open parentheses 0 close parentheses equals 2 comma g open parentheses 0 close parentheses equals 0 comma f open parentheses 1 close parentheses equals 6. Let there exist a real number c in open square brackets 0 comma blank 1 close square brackets such that f to the power of ´ end exponent open parentheses c close parentheses equals 2 g to the power of ´ end exponent open parentheses c close parentheses comma then the value of g left parenthesis 1 right parenthesis must be

    Maths-General
    General
    Maths-

    If the curves fraction numerator x to the power of 2 end exponent over denominator a to the power of 2 end exponent end fraction plus fraction numerator y to the power of 2 end exponent over denominator 12 end fraction equals 1 blankand y to the power of 3 end exponent equals 8 x blankintersect at right angle then the value of a to the power of 2 end exponentis equal to

    If the curves fraction numerator x to the power of 2 end exponent over denominator a to the power of 2 end exponent end fraction plus fraction numerator y to the power of 2 end exponent over denominator 12 end fraction equals 1 blankand y to the power of 3 end exponent equals 8 x blankintersect at right angle then the value of a to the power of 2 end exponentis equal to

    Maths-General
    parallel
    General
    Maths-

    The function f open parentheses x close parentheses equals cos invisible function application left parenthesis pi divided by x right parenthesis is increasing in the interval

    The function f open parentheses x close parentheses equals cos invisible function application left parenthesis pi divided by x right parenthesis is increasing in the interval

    Maths-General
    General
    Maths-

    The values of a in order that f open parentheses x close parentheses equals square root of 3 sin invisible function application x minus cos invisible function application x minus 2 a x plus b decreases for all real values of x, is given by

    The values of a in order that f open parentheses x close parentheses equals square root of 3 sin invisible function application x minus cos invisible function application x minus 2 a x plus b decreases for all real values of x, is given by

    Maths-General
    General
    Maths-

    If the ratio of base radius and height of a cone is 1 blank colon 2 and percentage error in radius is lambda blank percent sign comma then the error in its volume is

    If the ratio of base radius and height of a cone is 1 blank colon 2 and percentage error in radius is lambda blank percent sign comma then the error in its volume is

    Maths-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.