Thermal Energy Transfer Lowersixth Science Physics

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Test knowledge on thermal conduction concepts and analogies.

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Thermal Energy Transfer Lowersixth Science Physics


Froggy Jumps Thermal Energy Transfer Lowersixth Science PhysicsVersion en ligne Test knowledge on thermal conduction concepts and analogies. par YAKILI LMS 1 Which material is a poor thermal conductor (insulator) for everyday use? a Silver b Plastic foam c Copper 2 What is the main property that determines a material's ability to conduct heat? a Thermal conductivity b Electrical resistance c Density 3 In a metal bar, heat flows from _____ to _____ temperature regions. a hot end to cold end b cold end to hot end c midpoints equally 4 Which term describes the rate of heat transfer per unit area per temperature difference? a Thermal conductance b Thermal inertia c Thermal capacity 5 A good conductor of heat is typically: a Plastic b Metal c Wood 6 Thermal resistance is analogous to what in electricity? a Inductance b Capacitance c Electrical resistance 7 Which factor does NOT affect thermal conductivity of a metal? a Color b Crystal structure c Temperature 8 An ideal thermal insulator would minimize: a Electrical current b Heat transfer c Magnetic fields 9 Composite bars usually have heat flow determined by: a Series or parallel thermal resistances b Only the outer material c No resistance 10 In a thermal circuit, a high thermal resistance implies: a Low heat transfer b High heat transfer c No temperature difference 11 Which method reduces heat loss in buildings most effectively? a Using thermal insulation b Increasing window size c Painting walls 12 Which quantity is conserved in steady-state heat conduction along a rod? a Mass b Heat flow rate c Temperature 13 Which term best describes a material with low thermal conductivity? a Thermal conductor b Thermal insulator c Thermometer 14 Fourier's law relates heat flux to: a Thermal conductivity and temperature gradient b Electrical resistance c Pressure gradient 15 If a bar has uniform material and steady state, temperature distribution is: a Quasi-linear b Oscillatory c Exponential 16 Which would increase heat transfer in a metal rod? a Decrease length b Increase insulation c Increase cross-sectional area 17 What is a practical example of a thermal conductor? a Copper wire b Polystyrene foam c Glass wool 18 Which device measures temperature distribution along a rod? a Thermocouples along the rod b A ammeter c A voltmeter 19 Thermal contact resistance occurs at: a In vacuum b Within a single bulk material c Interfaces between materials 20 In a thermal resistance network, equivalent length accounts for: a Total resistance b Physical length only c Electrical current 21 Which factor reduces heat loss by conduction through walls? a Thick metal sheets only b Removing insulation c Adding insulation layers 22 Analogy: in electricity, Ohm's law is similar to: a Fourier's law for conduction b Hooke's law c Newton's law 23 A bar with higher thermal conductivity has: a Higher mass b Higher gradient c Lower temperature gradient for the same heat flow 24 Which material is typically a good thermal insulator? a Aluminum b Air c Iron 25 Thermal inertia depends on: a Only mass b Only conductivity c Mass, specific heat capacity, and thermal conductivity 26 An insulator reduces heat transfer mainly by: a Raising temperature b Lowering the rate of heat flow c Increasing energy generation 27 What is the effect of increasing the thickness of an insulating layer? a No change b Increases heat transfer c Decreases heat transfer 28 Which scenario best illustrates a thermal conductor? a Heat moves quickly from hot coffee to a mug b Heat stays in coffee c Mug becomes colder instantly 29 When two materials are in contact, thermal contact resistance: a Has no effect b Increases transfer c Reduces effective heat transfer 30 A composite bar has sections with different conductivities. The temperature profile is: a Constant everywhere b Non-uniform but continuous c Discontinuous 31 Which is not a mode of heat transfer in solids? a Radiation within a solid b Convection c Conduction 32 Thermal conductivity of air is: a High b Very high c Low 33 Which device helps reduce heat loss in buildings via insulation? a Bricking up walls b Metal shutters c Double-glazed windows 34 If a rod's ends are at 100°C and 0°C, the gradient is: a High at the ends, lower towards center b Zero gradient c Uniform throughout 35 Thermal resistance in a wall is analogous to: a Capacitance b Electrical resistance in a circuit c Inductance 36 To increase heat conduction through a rod, you could: a Decrease area? b Increase temperature difference c Increase insulation 37 Which is a practical use of thermal insulators? a Faster melting b Cooling and heating energy efficiency c Better electrical conduction 38 Which statement is true for steady-state conduction? a Heat stored accumulates endlessly b Temperature is constant everywhere c Heat transfer rate is constant along the rod 39 In a thermal network, a node with high temperature difference implies: a Zero gradient b Potential for more heat transfer c No heat transfer 40 Thermal diffusivity combines conductivity, density and: a Viscosity b Specific heat capacity c Elastic modulus 41 Which reduces conduction in a metal rod most effectively? a Heat the rod uniformly b Introduce a low-conductivity layer at contact c Coat with metal paint 42 What is the primary function of thermal insulation in clothing? a Increase heat generation b Enhance sweating c Minimize heat loss to the environment 43 Which factor does not affect a composite bar's heat flow? a Cross-sectional areas b Thermal conductivities c Color of the exposed surface 44 Which is a good example of a conductor in household use? a Copper cookware b Styrofoam cup c Wooden spoon 45 Analogy: a thicker thermal conductor behaves like a: a Lower resistance b Capacitor c Higher electrical resistance in the path 46 What effect does poor contact have on heat transfer? a No effect b Decreases resistance c Increases thermal resistance 47 Which is a characteristic of a good insulator? a Low thermal conductivity b High thermal inertia c High density 48 The temperature distribution along a uniform bar in steady state is: a Jagged b Curved c Linear 49 Heat flow in a solid is primarily by: a Conduction b Radiation c Convection 50 Which material would typically have a high thermal conductivity? a Aluminum b Styrofoam c Fiberglass

Thermal Energy Transfer Lowersixth Science Physics

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Thermal Energy Transfer Lowersixth Science PhysicsVersion en ligne

par YAKILI LMS

Which material is a poor thermal conductor (insulator) for everyday use?

What is the main property that determines a material's ability to conduct heat?

In a metal bar, heat flows from _____ to _____ temperature regions.

Which term describes the rate of heat transfer per unit area per temperature difference?

A good conductor of heat is typically:

Thermal resistance is analogous to what in electricity?

Which factor does NOT affect thermal conductivity of a metal?

An ideal thermal insulator would minimize:

Composite bars usually have heat flow determined by:

In a thermal circuit, a high thermal resistance implies:

Which method reduces heat loss in buildings most effectively?

Which quantity is conserved in steady-state heat conduction along a rod?

Which term best describes a material with low thermal conductivity?

Fourier's law relates heat flux to:

If a bar has uniform material and steady state, temperature distribution is:

Which would increase heat transfer in a metal rod?

What is a practical example of a thermal conductor?

Which device measures temperature distribution along a rod?

Thermal contact resistance occurs at:

In a thermal resistance network, equivalent length accounts for:

Which factor reduces heat loss by conduction through walls?

Analogy: in electricity, Ohm's law is similar to:

A bar with higher thermal conductivity has:

Which material is typically a good thermal insulator?

Thermal inertia depends on:

An insulator reduces heat transfer mainly by:

What is the effect of increasing the thickness of an insulating layer?

Which scenario best illustrates a thermal conductor?

When two materials are in contact, thermal contact resistance:

A composite bar has sections with different conductivities. The temperature profile is:

Which is not a mode of heat transfer in solids?

Thermal conductivity of air is:

Which device helps reduce heat loss in buildings via insulation?

If a rod's ends are at 100°C and 0°C, the gradient is:

Thermal resistance in a wall is analogous to:

To increase heat conduction through a rod, you could:

Which is a practical use of thermal insulators?

Which statement is true for steady-state conduction?

In a thermal network, a node with high temperature difference implies:

Thermal diffusivity combines conductivity, density and:

Which reduces conduction in a metal rod most effectively?

What is the primary function of thermal insulation in clothing?

Which factor does not affect a composite bar's heat flow?

Which is a good example of a conductor in household use?

Analogy: a thicker thermal conductor behaves like a:

What effect does poor contact have on heat transfer?

Which is a characteristic of a good insulator?

The temperature distribution along a uniform bar in steady state is:

Heat flow in a solid is primarily by:

Which material would typically have a high thermal conductivity?

In a metal bar, heat flows from _ to _ temperature regions.