# Energetics 3 ph Quiz

#### Quiz Description

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!

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

Correct
• If 1 and 2 are correct
• if 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• if 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• . If 1 and 2 are correct
• . If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• . If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

Electrical instrument(s) that is /are adapted for measuring both current and voltage
1. Multimeter
2. Multivibrator
3. Multi-purpose electrical meters

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

The thermoelectric effect can be demonstrated using
2. The see beck effect
3. The Peltier and Thomson effects

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

Example(s) of energy source(s) that will never run out
1. Sun
2. Tides
3. Petrol

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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.

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• . If 1 only is correct
• If 3 only is correct

The primary fuels derived from living organism can be also called
1. Biomass
2. Bio-fuels
3. Nuclear fuels

Correct
• if 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• If 3 only is correct

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

Correct
• If 1 and 2 are correct
• If 2 and 3 are correct
• If 1 only is correct
• . If 3 only is correct