Interference Notes Questions with Answers PDF Download – Test 47

Two waves with phase difference 180° have resultant of amplitude

1. one
2. zero
3. same as the single wave
4. doubles the single wave

Speed of snail as compared to speed of a car will be in units

1. cms^-1
2. ms^-1
3. kms^-1
4. km h^-1

When a charged particle is accelerated through a potential difference V, its kinetic energy

1. decreases
2. remains same
3. increases
4. varies depending on resistance of wire

Hooke's law states that

1. the extension is proportional to the load when the elastic limit is not exceeded
2. the extension is inversely proportional to the load when the elastic limit is not exceeded
3. the extension is independent of the load when the elastic limit is not exceeded
4. load is dependent on extension

A component that allows unidirectional current to pass through it is

1. resistor
2. inductor
3. transformer
4. diode