The number of vibrations executed by an oscillating body in one second is called
A Frequency
B Time period
C Amplitude
D All of these
Which one of the following is not a semi – conductor
A Silicon
B Germanium
C Diamond
D Gallium
A typical example of a semi conductor is
A Germanium
B Mica
C Platinum
D Quartz
The charge carriers inp-type materials are
A Electrons
B Protons
C Negative ions
D Holes
A transistor can be used as
A Voltage amplifier
B Current amplifier
C Oscillator
D All of these
The waves do not require a medium for propagation is called
A Longitudinal waves
B Mechanical waves
C Electromagnetic waves
D None of them
An oscillatory vibratory motion is always under
A Gravitation force
B Periodic force
C Applied force
D Elastic restoring force
The waves which require a medium for propagation is called
A Electromagnetic waves
B Mechanical waves
C Long waves
D None of them
Frequency and time period are
A Equal to each other
B Equal to each other but in opposite direction
C Reciprocal to each other
D None of them
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