__Here__, specifically to Energetics 3 Ph quizzes. Energy is all around us, the human race presently is most dependent on energy as it helps developed countries in agriculture, transportation, ICT, Information exchange, and even human communication. After this, you will find many fascinating questions about thermal energy, temperature, electrical energy, etc.

Energetics is simply a branch of Physics that studies the flow and transformation of __energy__ It is also the study of energy movement and storages under change. Energetics is a wide field of study and involves sub-topics like thermodynamics which is the study of the science of the relationship between heat, work, temperature, and energy. The study of thermodynamics is governed by 3 laws. And the first is the main, energy can neither be created nor destroyed but can only be changed from one form to another, for example, generating light energy from electrical energy.

Students will therefore better understand what energetics is all about after taking all the __3 quizzes__ in energetics: energetics ph 1 and energetics ph 2.

Good luck!

1:

Which of the following statements about a nuclear fission reaction is/are true?

1. The moderator promotes the capture of neutrons be U-238

2. The control rods prevent the reactor overheating

3. The control rods must be about 4m long

2:

What is the significance of triple point of water?

1. It gives a value of 273.16k

2. It gives the temperature of pure water and melting ice at equilibrium

3. It gives the lowest attainable temperature of a body

3:

The Zeroth law leads to the conclusion that:

1. Temperature is a well-defined physical quantity

2. Temperature and heat are similar

3. Two bodies can be at thermal equilibrium

4:

The heat energy requires to convert a unit mass of substance from solid to liquid at constant temperature.

1. Latent heat of fusion

2. Specific latent heat of vaporization

3. Specific laten heat of fusion

5:

The first law of thermodynamics states

1. Total energy in the universe can be put into a closed system

2. An ideal gas is independent of its energy

3. The total energy in a closed system is constant

6:

The square root of c2 is known as

1. The root-mean-square speed

2. The mean square velocity

3. The square root of the mean square speed

7:

What is/are the significance(s) of a constant volume gas thermometer?

1. Can be used to make other thermometers

2. Can be used to graduate other thermometers

3. Can be used to graduate other thermometers

8:

When two resistors are connected in parallel, the combined resistance is always

1. More than the smallest resistors

2. Less than smallest resistor

3. May be less than or equal to the smallest resistors

9:

Which of these is/are advantage(s) of a potentiometer

1. It draws no current from the p.d

2. The results only depend on measurement

3. It has no wire/cable to burn out

10:

From Kirchhoff’s law one, we can conclude that

1. In a closed loop, charge is always conserved

2. Energy is always conserved

3. Some sections of the circuits have the same p.d

11:

Heat supplied at one end of a well lagged conductor and the other end maintained at 0 degree

Celsius

1. At steady state, the rate of heat flow along the conductor is constant

2. The temperature gradient along the conductor is constant after steady state is reached

3. The thermal resistance of the conductor decreases from hot end to the cold end

12:

At the boiling point of water

1. The temperature of the water and atmospheric pressure are at equilibrium.

2. The internal energy of the volume of water decrease as it changes from liquid to vapor

3. The water boil because the vapor pressure is equal to the atmospheric pressure

13:

A net energy will always show flow from body x to body y when they are in thermal contact if

1. X has more quanta than y

2. X has more atoms than y

3. The average number of quanta per atom in x is greater than in y

14:

For resistors connected in series

1. Current is different through all resistors

2. Current is the same through

3. Total resistance = sum of individual resistance

15:

Electrical instrument(s) that is /are adapted for measuring both current and voltage

1. Multimeter

2. Multivibrator

3. Multi-purpose electrical meters

16:

High tension transmission requires

1. The waste power to be small

2. The voltage to be as high as possible

3. The cables to be very tinny

17:

The thermoelectric effect can be demonstrated using

1. The faraday’s effect

2. The see beck effect

3. The Peltier and Thomson effects

18:

The equations below shows a relationship between the thermoelectric E.M.F and temperature

E=aӨ + bӨ 2 where the symbol represents their usual meanings a and b are constants.

Where a graph of E/Ө is plotted against Ө, the important of b is:

1. It gives the gradients/ slope

2. It gives the maximum value

3. It gives the y-intercept

19:

Example(s) of energy source(s) that will never run out

1. Sun

2. Tides

3. Petrol

20:

Why must non-renewable sources of energy need to be conserved

1. Because once used they cannot be replaced

2. Because of the limited nature of it

3. Because they are being converted into other forms of energy.

21:

The primary fuels derived from living organism can be also called

1. Biomass

2. Bio-fuels

3. Nuclear fuels

22:

What is/are the function(s) of the reservoir in hydroelectric plant

1. Stores the kinetic energy of water

2. Converts gravitational potential energy to K.E of turbine

3. Regulates the flow of the river which may vary greatly according to season

23:

The constant volume gas the thermometer cannot be used in all situations. This is because

1. It is bulky

2. It is slow to respond

3. It is too sensitive

24:

The law of conservation of energy can be state thus.

ΔQ = ΔU + ΔW where the symbols represent their usual meanings ΔQ is positive when

1. Heat is supplied to the gas

2. Heat is taken away from the gas

3. Work is done on the gas