Physics-
General
Easy

Question

An object is placed in front of a convex mirror of focal length f. Find the maximum and minimum distance of two object from the mirror such that the image is real and magnified.

  1. 20 and ∞    
  2. f and 2f  
  3. f and 0    
  4. None of these    

The correct answer is: f and 2f


    For real image v equals 0
    therefore From fraction numerator 1 over denominator f end fraction equals fraction numerator 1 over denominator v end fraction plus fraction numerator 1 over denominator u end fraction

    Related Questions to study

    General
    biology

    The Ti plasmid, is often used for making transgenic plants. This plasmid is found in

    The Ti plasmid, is often used for making transgenic plants. This plasmid is found in

    biologyGeneral
    General
    physics-

    The figure shows the stress-strain graph of a certain substance. Over which region of the graph is Hook’s Law obeyed ?

    The figure shows the stress-strain graph of a certain substance. Over which region of the graph is Hook’s Law obeyed ?

    physics-General
    General
    biology

    Which is true for repressible operon

    Which is true for repressible operon

    biologyGeneral
    parallel
    General
    physics-

    Two wires of the same material (Young’s modulus Y) and same length Lbut radii R and 2R respectively are joined end to end and a weight w is suspended from the combination as shown in the figure. The elastic potential energy in the system is

    Two wires of the same material (Young’s modulus Y) and same length Lbut radii R and 2R respectively are joined end to end and a weight w is suspended from the combination as shown in the figure. The elastic potential energy in the system is

    physics-General
    General
    physics-

    Two wires, one made of copper and other of steel are joined end to end (as shown in figure). The area of cross-section of copper wire is twice that of steel wire.

    They are placed under compressive force of magnitudes F. The ratio for their lengths such that change in lengths of both wires are same is (Y subscript s end subscript equals 2 cross times 10 to the power of 11 end exponent N m to the power of negative 2 end exponent blank a n d Y subscript c end subscript equals 1.1 cross times 10 to the power of 11 end exponent N m to the power of negative 2 end exponent right parenthesis

    Two wires, one made of copper and other of steel are joined end to end (as shown in figure). The area of cross-section of copper wire is twice that of steel wire.

    They are placed under compressive force of magnitudes F. The ratio for their lengths such that change in lengths of both wires are same is (Y subscript s end subscript equals 2 cross times 10 to the power of 11 end exponent N m to the power of negative 2 end exponent blank a n d Y subscript c end subscript equals 1.1 cross times 10 to the power of 11 end exponent N m to the power of negative 2 end exponent right parenthesis

    physics-General
    General
    biology

    Which is true for typtophan operon

    Which is true for typtophan operon

    biologyGeneral
    parallel
    General
    maths-

    If f: R+rightwards arrow R+, f(x) = x2+ 1/x2 and g: R+rightwards arrowR+, g(x) = ex then (gof) (x) equals-

    If f: R+rightwards arrow R+, f(x) = x2+ 1/x2 and g: R+rightwards arrowR+, g(x) = ex then (gof) (x) equals-

    maths-General
    General
    maths-

    If f: R rightwards arrow R, f(x) = x2–5x + 4 and g: R rightwards arrowR, g(x) = log x, then the value of (gof) (2) is -

    If f: R rightwards arrow R, f(x) = x2–5x + 4 and g: R rightwards arrowR, g(x) = log x, then the value of (gof) (2) is -

    maths-General
    General
    physics-

    The ratio of diameters of two wires of same materials is n: 1. The length of each wire is 4 m. On applying the same load, the increase in length of thin wire will be open parentheses n greater than 1 close parentheses

    The ratio of diameters of two wires of same materials is n: 1. The length of each wire is 4 m. On applying the same load, the increase in length of thin wire will be open parentheses n greater than 1 close parentheses

    physics-General
    parallel
    General
    physics-

    A uniform slender rod of length L, cross-sectional area A and Young’s modulus Y is acted upon by the forces shown in the figure. The elongation of the rod is

    A uniform slender rod of length L, cross-sectional area A and Young’s modulus Y is acted upon by the forces shown in the figure. The elongation of the rod is

    physics-General
    General
    biology

    The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents ?

    The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents ?

    biologyGeneral
    General
    physics-

    Two cylinders of same material and of same length are joined to end as shown in figure. The upper end of A is rigidly fixed. Their radii are in ratio of 1 : 2, If the lower end of B is twisted by an angle theta comma blankthe angle of twist of cylinder A is

    Two cylinders of same material and of same length are joined to end as shown in figure. The upper end of A is rigidly fixed. Their radii are in ratio of 1 : 2, If the lower end of B is twisted by an angle theta comma blankthe angle of twist of cylinder A is

    physics-General
    parallel
    General
    physics-

    In the figure three identical springs are shown. From spring A, a mass of 4 kg is hung and spring shows elongation of 1 cm. But when a weight of 6 kg is hung on B, the Hook descends

    In the figure three identical springs are shown. From spring A, a mass of 4 kg is hung and spring shows elongation of 1 cm. But when a weight of 6 kg is hung on B, the Hook descends

    physics-General
    General
    biology

    A test cross is carried out to :

    A test cross is carried out to :

    biologyGeneral
    General
    biology

    The figure below is the diagrammatic respesentation o the E.Coli vector pBR 322. Which one of the given options correctly identifies its certain component(s) ?

    The figure below is the diagrammatic respesentation o the E.Coli vector pBR 322. Which one of the given options correctly identifies its certain component(s) ?

    biologyGeneral
    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.