TEST SERIES - 59 (I)

A man inside an artificial satellite feels weightlessness because the force of attraction due to earth is

• zero at that earth

• balanced by the force of attraction due to moon

• equal to centripetal force

• non-effective due to particular design of the satellite

Match List-I with List-II and select the correct answer using the codes given below:

• Wat

• Amp-ohm

• Joule

• Coulomb-volt

• Volt

• Henery-ampere/sec

• Coulomb

• Farad-volt

Match List-I with List-II and select the correct answer using the codes given below:

• Ampere

• Heat

• Joule

• Work

• Wat

• Potential difference

• Calorie

• Current

• Volt

• Power

A spherical body moves with uniform angular velocity (w) around a circular path of radius (r). Which one of the following statements is correct?

• The body has no acceleration

• The body has a radial acceleration w2r directed toward centre of path

• The body has a radial acceleration 2 2 5 ω r directed away from the centre of the path

• The body has an acceleration w2 tangential to its path

If we want to calculate the pressure of a liquid at the bottom of vessel, the quantity which is not required to determine it, is

• Height of the liquid column

• Surface area of the bottom of the vessel

• Density of the liquid

• Acceleration due to gravity at the bottom of the vessel

The excess of pressure inside a drop or bubble is

• Directly proportional to its mass

• Directly proportional to its radius

• Inversely proportional to its radius

• Inversely proportional to its surface tension

The orbital speed of jupiter is

• Greater than the orbital speed of the earth

• Less than the orbital speed of the earth

• Equal to the orbital speed of the earth

• Zero

The excess of pressure inside a drop or bubble is

• Directly proportional to its mass

• Directly proportional to its radius

• Inversely proportional to its radius

• Inversely proportional to its surface tension

In an elastic collision

• Momentum is conserved but energy is not

• Energy is conserved but momentum is not

• Both momentum and energy are conserved

• Neither momentum nor energy is conserved

Two pieces of different metals, when completely immersed in water, experience equal upthrust, then

• Both pieces have equal weight in air

• Both pieces have same density

• Both pieces have equal volume

• None of the above