Interference Notes Questions with Answers PDF Download – Test 47

MCQ 231: 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

MCQ 232: 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

MCQ 233: 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

MCQ 234: 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

MCQ 235: A component that allows unidirectional current to pass through it is:

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