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ECG is used for understanding the normal working of human heart. An ECG
consist of mainly three waves namely P wave, QRS complex and T wave in which
QRS complex represents

A) Ventricular depolarisation B) Atrial depolarisation

C) Ventricular repolarisation D) Atrial repolarisation

A pathogen named plasmodium is transmitting the disease malaria in human being.
Write the catagory to which this organism belongs.

A) Bacteria B) Fungus

C) Roundworm D) Protozoa

Small quantities of mercury placed on aclean glass plate assume spherical shapes.
The reason behind this is

A) Viscous force B) Surface tension

C) Buoyant force D) Capillarity

Arrange microwaves, ultraviolet rays, radio waves and infrared rays in the ascending
order of their energy.

A
B
0
D

microwaves < ultraviolet rays < radio waves < infrared rays
infrared rays < ultraviolet rays < radio waves < microwaves

radio waves < microwaves < infrared rays < ultraviolet rays

radio waves < ultraviolet rays < microwaves < infrared rays

When a body is moved from the equator to the south pole, its weight
A) Increases B) Decreases

C) Remains the same D) Becomes zero

Acricket ball is thrown up making an angle 45° with the horizontal. The angle between
velocity and acceleration, when the ball is at maximum height, is

A) 0° B) 120° C) 180° D) 90°

Which gas is produced when metals react with steam ?

A) Oxygen B) Hydrogen

C) Carbon dioxide D) Nitrogen

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