Question : Which type of friction is considered a self-adjusting force?

Option 1: Kinetic friction

Option 2: Centripetal friction

Option 3: Rolling friction

Option 4: Static friction

Question : Which of the following statements is correct?

I. Rolling friction is greater than the sliding friction.

II. The frictional force exerted by fluids is called drag.

Option 1: Only I is correct.

Option 2: Neither I nor II is correct.

Option 3: Both I and II are correct.

Option 4: Only II is correct.

Question : Magnetic keepers are used to protect magnets from:

Option 1: Earth's magnetic field

Option 2: effect of other magnets

Option 3: self-demagnetisation

Option 4: demagnetisation due to heating

Question : Which among the following are called the amphibians of the plant kingdom?

Option 1: Gymnosperm

Option 2: Bryophytes

Option 3: Thallophyte

Option 4: Angiosperm

Question : The disease-causing microbes are called _____.

Option 1: toxins

Option 2: pathogens

Option 3: decomposers

Option 4: antibodies