Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics energy : forms and sources production of electricity from solar energy solar equipment solar power renewable and non-renewable resources renewable and non-renewable sources of energy

In geothermal plants steam is raised by pumping water upto the layer of magma.                           .......................

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The most common way of capturing the energy from geothermal sources is to tap into naturally occurring 'hydrothermal convection' systems, where cooler water seeps into Earth's crust, is heated up, and then rises to the surface. Once this heated water is forced to the surface, it is a relatively simple matter to capture that steam and use it to drive electric generators. Geothermal power plants drill their own holes into the rock to more effectively capture the steam.
Hence, the statement is true.

Multiple choice physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

We sit in the room with windows open. Then

  1. Air pressure on the floor of the room equals the atmospheric pressure but the air pressure on the ceiling is eligible

  2. Air pressure is nearly the same on the floor, the walls and ceiling

  3. Air pressure on the floor equals the weight of the air coloumn inside the room (from floor to the ceiling) per unit area

  4. Air pressure on the walls is zero since the weight of air acts downward
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pressure of gas is same everywhere in the vessel.

Multiple choice physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

What happens when pressure inside a sealed can is less than the atmospheric pressure?

  1. The can is crushed

  2. The can bursts

  3. No change is observed

  4. The can swells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When pressure inside a sealed can becomes less than the atmospheric pressure, the atmospheric pressure pushes the surface of the can inside and the can is crushed.

Multiple choice physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

What happens, when the pressure inside a sealed bottle exceeds the atmospheric pressure?

  1. The bottle bursts out

  2. The bottle gets crushed

  3. The bottle remains as it is

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When the pressure inside a sealed bottle exceeds the atmospheric pressure, it bursts out.

Multiple choice physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

In crushing can experiment the can gets crushed because of:

  1. dcrease in internal pressure

  2. Increase in internal pressure

  3. increase in atmospheric pressure

  4. decrease in atmospheric pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Crushing can experiment , Take an empty and absolutely clean Mobil oil can and put in it about 0.25 liter of water. Great the can in fire till all the air is expelled out and the steam comes out freely from its mouth.screw the mouth of the can with a lid and immediately remove it away from the fire .pour cold water on the can. It is found that the can gets crushed.the reason is that on pouring cold water, the steam changes into water ,thereby,causing a vacuum inside the can. Thus the tremendous atmospheric pressure,exerts pressure from outside and crushed the can.