When we apply pressure on toothpaste tube, the toothpaste comes out due to the principle of:
Gravity
Inertia
Buoyancy
Pascal's law
Answer: d) Pascal's law
Which type of mirror is used in rear-view mirrors of vehicles?
Concave mirror
Convex mirror
Plane mirror
Spherical mirror
Answer: b) Convex mirror
The process of converting sunlight into electrical energy using
photovoltaic cells is known as:
Solar heating
Solar radiation
Solar power
Solar photovoltaics
Answer: d) Solar photovoltaics
When a glass rod is rubbed with a piece of silk cloth, it acquires an
electric charge. This phenomenon is known as:
Conduction
Induction
Electromagnetism
Static electricity
Answer: d) Static electricity
Which type of energy is possessed by an object when it is at rest?
Potential energy
Kinetic energy
Thermal energy
Chemical energy
Answer: a) Potential energy
Which substance is commonly used to put out small fires?
Water
Sand
Carbon dioxide
Fire extinguisher
Answer: a) Water