Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

State whether true or false :
Water flows in a solar water heater due to the pressure difference between two ends of copper tube.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water always flow due to pressure difference generated by heat in solar cooker.

True.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

State whether true or false :
Solar water heater requires a huge maintenance cost.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  1. Clean the glass cover regularly .
    2.Prevent nay shade of the collector.
    3. Be economical with the use of water.
    4.Run the hot water slowly ; this will avoid the mixing of hot and cold water in the storage tank.
    5.Set the thermostat of the electrical backup as low as is comfortable.

    So this what you have to do to maintain your solar cooker as you can see it will require very less cost for maintenance.
Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

State whether true or false :
In order to increase the area absorbing heat energy, coil shaped copper tube is used. 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The box contains copper tubes  bent in the form of a coil (zig-zag shape). This is done to increase the surface area  for absorbing heat.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Which of the following can't be used to make a solar cell?

  1. Silicon

  2. Platinum

  3. Gallium

  4. Germanium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solar cells are made of semiconductor materials like silicon, gallium, or germanium. Platinum is a metal and is not a semiconductor, so it cannot be used to make a solar cell.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Of the following converts light energy into electrical energy?

  1. Motor

  2. Battery

  3. Solar cell

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A solar cell is specifically designed to convert light energy into electrical energy.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Which of the following metals is used as connecting wires that connect solar cells in a solar panel?

  1. Copper

  2. Iron

  3. Aluminium

  4. Silver
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Silver is the metal which is used for connecting wires that connect solar cells in a solar panel, due to its large conductivity.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Which one of the following can be used as a box type solar cooker?

  1. A double walled cooker made of plastic and its inner wall is painted white.

  2. A double walled cooker made of copper and its inner wall is painted black.

  3. A double walled cooker made of plastic and its inner wall is painted black.

  4. A single walled cooker made of copper and its both sides are painted white.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A box-type solar cooker requires a material with good thermal conductivity (like copper) and an inner surface painted black to maximize the absorption of solar radiation.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Solar cell converts what type of energy into electricity?

  1. Heat

  2. Light

  3. Both Heat and Light

  4. Sound
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solar cell use light energy from photons (basic unit of light energy) and convert it to electricity using semiconductor physics.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Food gets cooked faster in a pressure cooker because ___________________.

  1. Water starts boiling at a higher temperature due to high pressure

  2. Water boils only at 100 °C but the heat content is higher at high pressure

  3. Water boils only at 100 °C but the heat content is higher at low pressure

  4. Convection currents are set inside the cooker
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A pressure cooker increases the pressure inside the vessel, which raises the boiling point of water. This allows the food to cook at a higher temperature, significantly reducing cooking time.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

A solar cell converts ________ (sound / light) energy to_______ (light /  electrical) energy. Fill the blanks. 

  1. Light, electrical

  2. Sound , light

  3. electrical, light

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

A solar cell converts light energy into electrical energy.