A lamp consumes 1000 J of electrical energy in 10 seconds. What is its power?

Solution

Electrical energy consumed by lamp, W = 1000 J
Time taken, t = 10 seconds

Power, P = $\frac{Work}{time} = \frac{W}{t} = \frac{1000}{10} = 100 J s^{- 1} = 100 W$

Some More Questions From Matter In Our Surroundings Chapter

Convert the following temperature to Celsius scale.

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Matter In Our Surroundings

A lamp consumes 1000 J of electrical energy in 10 seconds. What is its power?

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Convert the following temperature to Celsius scale.

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For Daily Free Study Material Join wiredfaculty

Matter In Our Surroundings

A lamp consumes 1000 J of electrical energy in 10 seconds. What is its power?

Some More Questions From Matter In Our Surroundings Chapter

Convert the following temperature to Celsius scale.573 K

Convert the following temperatures to Kelvin scale25°C

What is the physical state of water at100 °C

For any substance, why does the temperature remain constant during the change of state ?

Suggest a method to liquify atmospheric gases.

Convert the following temperatures to Kelvin scale.35°C

Give reason for the following observations.Naphthalene balls disappear with time without leaving any solid.

Give reason for the following observations.We can get the smell of perfume sitting several metres away.

What is the physical state of water ata) 25°C b)00Cc)1000C

What is the physical state of water at0°C

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Convert the following temperature to Celsius scale.

573 K

Convert the following temperatures to Kelvin scale

25°C

What is the physical state of water at

100 °C

Convert the following temperatures to Kelvin scale.

35°C

Give reason for the following observations.

Naphthalene balls disappear with time without leaving any solid.

Give reason for the following observations.

We can get the smell of perfume sitting several metres away.

What is the physical state of water at

a) 25°C
b)0⁰C
c)100⁰C

What is the physical state of water at
0°C