Advertisements
Advertisements
Question
A microphone converts :
Options
electrical energy into sound energy in ordinary telephone
microwave energy into sound energy in a mobile phone
sound energy into mechanical energy is a stereo system
sound energy into electrical energy in public address system
Advertisements
Solution
A microphone converts sound energy into electrical energy in public address systems.
Therefore, the answer is, (d) Sound energy into electrical energy in public address system.
APPEARS IN
RELATED QUESTIONS
In what way does the temperature of water at the bottom of a waterfall differ from the temperature at the top? Explain the reason.
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
What kind of energy is possessed by the following?
A compressed spring ____________.
Water stored in a dam possesses :
Name the device or machine which convert :
Chemical energy into electrical energy.
How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
An automobile engine propels a 1000 kg car (A) along a levelled road at a speed of 36 km h–1. Find the power if the opposing frictional force is 100 N. Now, suppose after travelling a distance of 200 m, this car collides with another stationary car (B) of the same mass and comes to rest. Let its engine also stop at the same time. Now the car (B) starts moving on the same level road without getting its engine started. Find the speed of the car (B) just after the collision.
A girl with having a mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s–1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?
A body of mass 10 kg falls from a height of 20 m to 8 m. Calculate:
- the loss in potential energy of the body, and
- the total energy possessed by the body at any instant? (Take g = 10 m s-2)
