Which of the following substance is not a good conductor of electricity?
- A. Human body
- B. Glass
- C. Aluminium
- D. Earth
- E. Copper
Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain the
- A. relative humidity is higher than at sea-level
- B. rays of the sun adds more heat to the water
- C. temperature is lower than that at sea-level
- D. pressure is lower than that at sea-level
- E. pressure is more than that at sea-level
Which of the followiempeng statements is/are not correct?
- A. Evaporation takes place only at the surface of the liquid
- B. Boiling takes place throughout the volume of the liquid
- C. Evaportaion takes place at all temperatures
- D. Boiling takes place at a particular temperature for a liquid at a fixed external pressure
- E. The boiling point of a liquid is not affected by impurities
Which of the following surfaces will radiate heat energy best?
- A. Red
- B. White
- C. Black
- D. Yellow
- E. Blue
A thermometer has its stem marked in millimeter instead of degree Celsius. The lower fixed point is 30mm and the upper is 180mm. Calculate the temperature in degree celsius when the thermometer reads 45mm.
- A. 67.5oC
- B. 30.0oC
- C. 25.0oC
- D. 15.0oC
- E. 10.0oC
An engine raises 1000kg of water through a height of 60m in 20s. What is the power of the engine? (Take g = 10ms-2>).
- A. 120,000 W
- B. 30,000 W
- C. 333 W
- D. 300 W
- E. 30 W
Which of the following is a derived unit?
- A. Metre
- B. Coulomb
- C. Kilogram
- D. Second
- E. Ampere
The motion of the prongs of the sounding tuning fork is
- A. random
- B. translational
- C. rotational
- D. vibratory
- E. vibratory and rotational
A stone tied to a string is made to revolve in a horizontal circle of radius 4m with an angular speed of 2 rad per sec. With what tangential velocity will the stone move off the circle if the string is cut?
- A. 16.0 ms-1
- B. 8.0 ms-1
- C. 6.0 ms-1
- D. 2.0 ms-1
- E. 0.5 ms-1
A piece of cork floating on water is acted upon by the forces of…
- A. Weight and viscosity
- B. weight and upthrust
- C. upthrust and viscosity
- D. weight only
- E. upthrust only
A block of material of volume 20cm-3 and density 2.5gcm-3 is suspended from a spring balance with half the volume immersed in water. What is the reading of the spring balance? (Density of water = 1.0gcm-3).
- A. 8g
- B. 25g
- C. 30g
- D. 40g
- E. 50g
Which of the following is used to determine the relative density of the acid in a car battery?
- A. Hypsometer
- B. Hygrometer
- C. Manometer
- D. Hydrometer
- E. Spectrometer
A boy pulls a nail from the wall with a string tied to the nail. The string is inclined at an angle of 60o to the wall. If the tension in the string is 4N, what is the effective force used in pulling the nail?
- A. 2√3 N
- B. 4 N
- C. 4√3 N
- D. 8 N
- E. 2 N
Which of the following is not a consequence of a force field?
- A. wieght
- B. surface tension
- C. gravitational pull
- D. magnetic force
- E. electric force
Which of the following is NOT a vector quantity?
- A. momentum
- B. force
- C. velocity
- D. temperature
- E. displacement