On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because :

Physics
On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because :

Metals are good conductors of heat

Plastics have a higher thermal conductivity than metals

Metals have higher thermal capacity than plastics

Plastics have a lower density than metals

Metals are good conductors of heat

Plastics have a higher thermal conductivity than metals

Metals have higher thermal capacity than plastics

Plastics have a lower density than metals

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Physics
A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ?

Remain constant

Will increase first and then dcrease

Increase

Dacrease

Remain constant

Will increase first and then dcrease

Increase

Dacrease

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Physics
Holography is a technique of

Recording a permanent three dimensional black and white photograph

Recording a permanent three dimensional multicolour photograph

Recording a permanent three dimensional photograph of a given single colour or a multicolour

Recording a permanent, sharp two diimensional black and white or multicolour photograph

Recording a permanent three dimensional black and white photograph

Recording a permanent three dimensional multicolour photograph

Recording a permanent three dimensional photograph of a given single colour or a multicolour

Recording a permanent, sharp two diimensional black and white or multicolour photograph

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Physics
The motion of the wheels of a bullock-cart while moving on the road is an example of

Translatory and rotatory motion

Oscillatory and translatory motion

Oscillatory and rotatory motion

Translatory motion only

Translatory and rotatory motion

Oscillatory and translatory motion

Oscillatory and rotatory motion

Translatory motion only

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Physics
When a ball is thrown vertically upwards, which of the following quantities remains constant during its motion?

Energy

Displacement

Velocity

Acceleration

Energy

Displacement

Velocity

Acceleration

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Physics
Heat from the sun reaches earth by the process of

All of these

Conduction

Convection

Radiation

All of these

Conduction

Convection

Radiation

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Physics

Physics On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because :

Physics A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ?

Physics Holography is a technique of

Physics The motion of the wheels of a bullock-cart while moving on the road is an example of

Physics When a ball is thrown vertically upwards, which of the following quantities remains constant during its motion?

Physics Heat from the sun reaches earth by the process of

Physics
On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because :

Physics
A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ?

Physics
Holography is a technique of

Physics
The motion of the wheels of a bullock-cart while moving on the road is an example of

Physics
When a ball is thrown vertically upwards, which of the following quantities remains constant during its motion?

Physics
Heat from the sun reaches earth by the process of