If the mass of bob of a simple pendulum is doubled, its time period:
Is doubled
Becomes four times
Remains same
Becomes half
Radio waves are:
Longitudinal waves
Transverse waves
Electromagnetic waves
All of these
The point through which rays of light pass after reflection from concave mirror is called principal:
Focus
Circle
Axis
Radius
Waves transfer:
Energy
Wavelength
Velocity
For a normal person audible frequency range for sound wave lies between:
10 Hz and 10kHz
20Hz and 20 kHz
25 Hz and 25 kHz
30Hz and 30 kHz
A digital multimeter is used to measure:
Current
Resistance
Potential difference
All of above