A digital multimeter is used to measure:
Current
Resistance
Potential difference
All of above
The A.C used in Pakistan has frequency:
60 Hz
30 Hz
50 Hz
130 Hz
The speed of sound in iron at 25°C is:
5950 m/sec
5900 m/sec
6950 m/sec
6940 m/sec
Vibratory motion
Damped motion
Linear motion
According to coulomb’s law, what happens to the attraction of two oppositely charged objects as their distance of separation increases:
Increases
Decreases
Remains unchanged
Cannot be determined
How does sound travel from its source to your ear:
By changes in air pressure
By vibration in wires or strings
By electromagnetic waves
By infrared waves
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 electrostatic force acting on two charges each of 1C separated by 1m is about:
9X109 N
9X10-9 N
9X108 N
9X10-8 N
