Physics
The waveform of a certain signal can be studied by

Sonometer
Spectrometer
P – n junction diode
Cathode ray oscilloscope

ANSWER DOWNLOAD EXAMIANS APP

Physics
Why does bleeding occur through the nose in high mountainous regions ?

The pressure at high altitudes is greater than that on the plains
The blood pressure of a person increases at high altitudes
The blood pressure fluctuates and finally decreases drastically
The pressure of blood in capillaries is greater than the outside pressure

ANSWER DOWNLOAD EXAMIANS APP