The amount of current that can be painful is:
0.005A
0.001A
1A
2A
The product of frequency and time period is equal to:
Which animal have ability to move his eye lens:
Snake
Fish
Ant
Tiger
The speed of sound in air at 21 °C is:
336ms-1
343ms-1
430ms-1
470ms-1
In liquids and gases the current is due to the motion of:
Negative charges
Positive charges
Both positive and negative charges
None of these
The oscillations of a system in the presence of which force are called damp oscillations:
Resistive force
Attractive force
Coulomb force
Both a and b
The intensity level of train siren is:
150 dB
100 dB
130 dB
120 dB