Home
Class 7
MATHS
The focal length of a less is given by t...

The focal length of a less is given by the formula `(1)/(f)=(1)/(u)+(1)/(v)`. Make f as the subject of the formula.
if `u=20cm` and v=30, then find f.
The following steps are involved in solving the above problem. Arrange them in sequential order.
(A) Given `(1)/(f)=(1)/(u)+(1)/(v)`
(B) `rArr f=(uv)/(u+v)`
(C) `f=(20xx30)/(20+30)=(600)/(50)=12`cm.
(D) `rArr (1)/(f)=(v+u)/(uv)`

A

DBAC

B

DACB

C

DABC

D

DCBA

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • FORMULAS

    PEARSON IIT JEE FOUNDATION|Exercise ASSESSMENT TESTS (Test 2)|8 Videos

  • FORMULAS

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION (Level 3) |11 Videos

  • FORMULAE

    PEARSON IIT JEE FOUNDATION|Exercise TEST 2|11 Videos

  • GEOMETRY

    PEARSON IIT JEE FOUNDATION|Exercise Test-2|12 Videos

Similar Questions

Explore conceptually related problems

If (1)/(f)=(1)/(u)+(1)/(v) , then make v as the subject of the formula.

If u=15 cm and f=6cm, then find v.

If f=3cm and v=4 cm, then find u.

If (1)/(f)=(1)/(u)+(1)/(v) , then make v as the subject o the foormula. Also find v, if u=12 units and f=3 units

What is f in mirror formula (1)/(u)+(1)/(v)=(1)/(f) ?

The focal length of a mirror is given by (1)/(v)-(1)/(u)=(2)/(f). If equal errors alpha are made inmeasuring u and v. Then relative error in f is