Question Discussion & Solution

Explanation:

• Sound is a longitudinal mechanical wave that propagates by making compressions (high pressure) and rarefactions(low pressure) in its propagating medium. 

• The amplitude of wavelength is the maximum distance the particle oscillating moves from the mean position.
• The frequency of the wave is the number of times one complete cycle of compressions 

• More the frequency more is the pitch of the sound, the sound is having more shrillness. 
• The more the amplitude the more is the loudness of the sound. 

So, loudness depends upon the amplitude.

Important Points 

• The Pitch of the sound depends upon frequency. 
• Mathematically, loudness is directly proportional to the square of the amplitude. 

L ∝ A2

Here the pattern is,

The cube is coloured on two adjacent faces (let us consider that the top and back surfaces are coloured)

So, the cubes on the surface having no colour will be 12 cubes on the front surface, 6 cubes on the right surface, 6 cubes on the left surface and 4 cubes at the bottom two surface.

So, cubes with no colour are:

12 + 6 + 6 + 4 = 28

Again, small cubes inside the big cube with no surface coloured is 8.

Therefore, cubes with no colour are = 28 + 8 = 36

The correct answer is To adjourn the Legislative Assembly.

• Article 174, a governor shall summon the House at a time and place, as she or he thinks fit.
• Article 174 (2) (a) says a governor may from “time to time” prorogue the House.
• Article 174 (2) (b) allows her or him to dissolve the Legislative Assembly.
• The speaker of the Legislative assembly has the right to adjourn the Legislative Assembly.

Key Points

• According to Article 153, each state in the country will have a governor.
• Also, a person can be appointed as the Governor of two or more states.
• According to Article 155, the Governor is appointed by the President.
• The powers of Governor :
  • The governor has the right to call the state assembly in any emergency and dissolve it at any time.
  • He also has the right to call a joint sitting of the two houses.
  • He has the right to repeal any bill to be passed in the State Legislative Assembly, sent back for review and sent to the President.
  • This means that no bill in the state assembly can be passed without the consent of the governor.
  • The Governor also has the task of issuing any ordinance during emergencies in the state.

The correct answer is Element.

Key Points

• An electric room heater or an electric heater used for cooking contains a coil of wire.
• The coil of wire used in electric heaters is called a heating element.
• The heating coil of the electric room heater transfers the electric energy into heat energy.
• The elements become red hot and give out heat after connecting to the electric supply.
• The amount of heat produced in a wire depends on its material used, length, and thickness.
• The coil of the electric heater is made up of nichrome.
• Nichrome consists of 80% nickel, 20% chromium.

Additional Information

• The filament is usually made of very thin tungsten wire.
  • In an incandescent bulb, an electric current is passed through a metal filament.
• A cell is a single unit device that converts chemical energy into electric energy.
  • It produces electricity capable to run smaller appliances.
• A battery usually consists of a group of cells.

Mistake Points

• A filament is a fine resistance wire the purpose of which is to emit white light. 
• An element is a resistive wire the sole purpose of which is to produce heat.