Home
Class 11
PHYSICS
If maching is lubricated with oil...

If maching is lubricated with oil

A

(a) The mechanical advantage of the machine increases

B

(b) The mechanical efficiency of the machine increases

C

(c) Both its mechanical advantage and efficiency increase

D

(d) Its efficiency increases, but its mechanical advantage decreases

Text Solution

Verified by Experts

The correct Answer is:
B
Friction decreases due to lubrication, which increases efficiency. Mechanical advantage depends upon geometrical construction of machine.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • WORK, POWER & ENERGY

    CENGAGE PHYSICS|Exercise Archives(multiple Correct)|3 Videos

  • WORK, POWER & ENERGY

    CENGAGE PHYSICS|Exercise Archives (assertion-reasoning)|1 Videos

  • WORK, POWER & ENERGY

    CENGAGE PHYSICS|Exercise Integer|14 Videos

  • VECTORS

    CENGAGE PHYSICS|Exercise Exercise Multiple Correct|5 Videos

Similar Questions

Explore conceptually related problems

Why do people sometimes put grease or oil on machine parts to lubricate them ?

Petroleum franction of which of thr following compositions can be used as a lubricating oil ?

Knowledge Check

  • When two surfaces are coated with a lubricant, then they

    A
    Stick to each other
    B
    Slide upon each other
    C
    Roll upon each other
    D
    None of these

  • Which one of the following can also act as a lubricant in the machines?

    A
    Iron fillings
    B
    Polish on machines
    C
    Flow of waler through the machine
    D
    Flow of compressed and purifie air.

  • ______is a mixture of various constituents such as petroleum gas, petrol, diesel, lubricating oil, paraffin wax

    A
    Crude oil
    B
    Petroleum
    C
    Diesel
    D
    Naptha

    • Similar Questions

    Explore conceptually related problems

    Why do people often use oil to lubricate the gears of a bicycle?

    Surface tension of all lubricating oils and paints is kept low. Why?

    In a machine, a block continously slides forward and backward on a horizontal platform. When lubricating oil is applied to their surfaces n contact, then the friction between them

    Graphite is used as lubricant due to

    When the two surface are coated with the lubricant, the they will

    Home
    Profile