Home
Class 11
PHYSICS
The angle subtended by a coin of radius ...

The angle subtended by a coin of radius 1 cm held at a distance of 80 cm from your eyes is :

A

1.25 rad

B

0.125 rad

C

`0.0125^(@)`

D

`0.025^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
`"Angle "theta=(b)/(x)`
`x=80xx10^(-2)`
`b=1 cm=1xx10^(-2)m`
`therefore theta=(1xx10^(-2))/(80xx10^(-2))=(1)/(80)=0.125" rad"`
Promotional Banner

Topper's Solved these Questions

  • NATURE OF PHYSICAL WORLD AND MEASUREMENT

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (II. Very Short Answer Questions.)|128 Videos

  • NATURE OF PHYSICAL WORLD AND MEASUREMENT

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (III. Short Answer Questions.)|24 Videos

  • NATURE OF PHYSICAL WORLD AND MEASUREMENT

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS (VI. Conceptual Questions.)|20 Videos

  • MOTION OF SYSTEM OF PARTICLES AND BODIES

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWER (NUMERICAL PROBLEMS)|60 Videos

  • OSCILLATIONS

    PREMIERS PUBLISHERS|Exercise OTHER IMPORTANT QUESTIONS & ANSWERS ( CONCEPTUAL QUESTIONS.)|24 Videos

Similar Questions

Explore conceptually related problems

One end of a cylindrical glass rod (mu = 1.5) of radius 1.0 cm is rounded in the shape of a hemisphere. The rod is immersed in water (mu= 4/3) and an object is placed in the water along the axis of the rod at a distance of 8.0 cm from the rounded edge. Locate the image of the object.

A point object is placed at a distance of 10cm and its real image is formed at a distance of 20 cm from a concave mirror. If the object is moved by 0.1 cm towards the mirror, the images will shift by about

Find the degree measure of the angle subtended at the centre of circle of radius 100 cm by an are of length 22 cm.

An object is placed on the principal axis of concave mirror of focal length 10 cm at a distance of 8.0 cm from the pole. Find the position and the nature of the image.

A solenoid of length 10 cm and radius 1 cm contains 200 turns and carries a current of 10 A. Find the magnetic field at a point on the axis at a distance of 10cm from the centre.

Choose the correct answer and give justification for each. (ii) From a point Q, the length of the tangent to a circle is 24 cm. and the distance of Q from the centre is 25 cm. The radius of the circle is

Chord of circle =24cms. It is at a distance of 5cm from centre . Find radius

A coin placed on a rotating turntable just slips if it is placed at a distance of 4 cm from the centre. If the angular velocity of the turntable is doubled, it will just slip at a distance of

An extended object is placed at a distance of 5.0 cm from a convex lens of focal length 8.0 cm. (a) Draw the ray diagram (to the scale) to locate the image and from this, measure the distance of the image from the lens, (b) Find the position of the image from the lens formula and see how close the drawing is to the correct result.

PREMIERS PUBLISHERS-NATURE OF PHYSICAL WORLD AND MEASUREMENT-OTHER IMPORTANT QUESTIONS & ANSWERS (I. Multiple Choice Questions.)
  1. The ratio of the dimension of planck constant and that of moment of in...

    Text Solution

    |

  2. Select the incorrect statement from the following statements : (i) T...

    Text Solution

    |

  3. The angle subtended by a coin of radius 1 cm held at a distance of 80 ...

    Text Solution

    |

  4. The density of a liquid in CGS system is 0.625g//cm^(3). What is its m...

    Text Solution

    |

  5. From the following units, select the odd man out.

    Text Solution

    |

  6. If "1 g cm s"^(-1)=x newton- second, then the number x is equal to:

    Text Solution

    |

  7. Which one of the following is not the unit of energy ?

    Text Solution

    |

  8. The respective number of significant figures for the number 13.013, 0....

    Text Solution

    |

  9. A student measured the length of a wire and wrote it as 2.50 can which...

    Text Solution

    |

  10. If the error in the measurement of radius of a sphere is 3% then the e...

    Text Solution

    |

  11. The diameter of the steel ball is measured using a vernier caliper whi...

    Text Solution

    |

  12. If A=2.331cm and C=2.1cm, then A+C=……..cm.

    Text Solution

    |

  13. Match the following units given in the column I with dimesnions in the...

    Text Solution

    |

  14. The least count of stop watch is 0.5s. The time of 40 oscillation of t...

    Text Solution

    |

  15. Assertion : SI system of units is a coherent system of units. Reason...

    Text Solution

    |

  16. The sum of the numbers 436.32, 227.2 and 0.301 in appropriate signific...

    Text Solution

    |

  17. Gross error can be eliminated by :

    Text Solution

    |

  18. The unit of permittivity of free space, epsilon0 is

    Text Solution

    |

  19. High precision instruments are used to eliminate …………….. Error.

    Text Solution

    |

  20. Assertion : The length of a cylinder is 23.8 cm. In this measurement t...

    Text Solution

    |