(A) Conductor
(B) Non-conductor
(C) Semi-conductor
(D) None of these
Q. Which of the following is a conductor?
(A) Plastic
(B) Rubber
(C) Iron
(D) wood
Q. A material having the conductivity value falling between that of a conduction and insulator is:
(A) Semi-conductor
(B) HTLS conductor
(C) Insulator
(D) None of these
Answers:
1. (B) Non-conductor
2. (C) Iron
3. (A) Semi-conductor
(A) Distance
(B) Time period
(C) Light intensity
(D) Time
Q. Newton is a unit of:
(A) Mass
(B) Force
(C) Acceleration
(D) None of these
Q. Coulomb is a unit of:
(A) Electric charge
(B) Power
(C) Energy
(D) None of these
Answers:
1. (A) Distance
2. (B) Force
3. (A) Electric charge
(A) Hygrometer
(B) Barometer
(C) Hydrometer
(D) None of these
Q. An instrument used to measure the relative density of liquids is called:
(A) Hydrometer
(B) Hygrometer
(C) Barometer
(D) None of these
Q. An instrument that is used to measure air pressure in a certain environment is:
(A) Hydrometer
(B) Hygrometer
(C) Barometer
(D) None of these
Answers:
1. (D) None of these
2. (A) Hydrometer
3. (C) Barometer
(A) Conduction
(B) Convection
(C) Radiation
(D) Reflection
Q. The transfer of heat internal energy by microscopic collision of particles and movement of electrons within a body is called:
(A) Thermal conduction
(B) Thermal convection
(C) Thermal radiation
(D) None of these
Q. The heat transfer due to bulk movement of molecules within fluids such as gases, liquids or molten rocks is called:
(A) Conduction
(B) Radiation
(C) Reflection
(D) Convection
Answers:
1. (B) Convection
2. (A) Thermal conduction
3. (D) Convection
(A) Rupiyah
(B) Lek
(C) Ringgit
(D) None of these
Q. Number of rivers in Sri Lanka is:
(A) 97
(B) 100
(C) 103
(D) 106
Q. The longest river in Sri Lanka is:
(A) Mahaweli River
(B) Malvathu River
(C) Kelani River
(D) Walawe River
Answers:
1. (D) None of these
2. (C) 103
3. (A) Mahaweli River