The apparent weight of a body wholly immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. (Density of water = 1000kgm^-3, g = 10ms^-3)

• A.8.9 x 10m^-3m³
• B.6.4 x 10m^-3m³
• c.3.2 x 10m^-3m³
• d.3.0 x 10m^-3m³

A pulse of a sound is transmitted from a ship and the reflection from the sea bed is recorded after 0.2s. Calculate the depth of the sea. [Take speed of sound in sea water = 1560ms^-1]

• A. 312.0m
• B. 156.0m
• C. 78.0m
• D. 31.2m

A cube of sides 0.1m hangs freely from a string. What is the upthrust on the cube when totally immersed in water? [density of water is 1000kgm^-2, g = 10ms^-2]

• A. 1000 N
• B. 700 N
• C. 110 N
• D. 10 N

Which of the following media allow(s) the transmission of sound wave through them? I. Air II. Liquid III. Solid.

• A. I only
• B. II only
• C. III only
• D. I, II and III.

On which of the following factor does the viscosity of a liquid depend? i. Nature of the liquid. ii. Temperature of the liquid. iii. Area of the liquid surface

• A. i and ii only
• B. ii and iii only
• C. i and iii only
• D. i, ii and iii

A gas would serve as an electrical conductor under

• A. reduced pressure and high current
• B. increased magnetic field
• C. reduced pressure and reduced potential
• D. exposure to visible light

When an a.c. voltage is applied to a capacitor, no power is consumed because the current

• A) leads the voltage by 90^°
• B) lags behind the voltage by 90^°
• C) and voltage are in phase
• D) and voltage are 180^° out of phase

A travelling microscope is focused on a mark on a table. If a glass block of thickness 18.0cm is placed on the mark by how many centimeters will the microscope be moved upwards so as to focus the mark once again? [refractive index of glass = 1.5] A travelling microscope is focused on a mark on a table. If a glass block of thickness 18.0cm is placed on the mark by how many centimeters will the microscope be moved upwards so as to focus the mark once again? [refractive index of glass = 1.5]

• A. 27cm
• B. 24cm
• C. 9cm
• D. 6cm

A body accelerates uniformly from rest at the rate of 3 ms^-2 for 8 seconds. Calculate the distance covered by the body during the acceleration?

• A. 12m
• B. 24m
• C. 48m
• D. 96m

A load is pulled at a uniform speed along a horizontal floor by a rope at 45o to floor. If the force in the rope is 1500N, what is the frictional force on the load ?

• A. 1524N
• B. 1350N
• C. 1260N
• D. 1061N