Question:
An electric immersion heater of $1.08 \,kW$ is immersed in water. After the water has reached a temperature of $ 100^{\circ }\,C, $ how much time will be required to produce $100\, g $ of steam?
An electric immersion heater of $1.08 \,kW$ is immersed in water. After the water has reached a temperature of $ 100^{\circ }\,C, $ how much time will be required to produce $100\, g $ of steam?
Updated On: Jun 20, 2022
- 50s
- 420s
- 105s
- 210s
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
$L$ is the latent heat of vaporization of water; the heat required for producing $1 \,g$ of steam,
$L=540\, cal =540 \times 4.2=2268\, J$
Energy supplied
$=1080\, J / s$
Time required to boil $100 \,g$ of water
$=540 \times 4.2 \times 100 / 1080 $
$=210\, s$
$L=540\, cal =540 \times 4.2=2268\, J$
Energy supplied
$=1080\, J / s$
Time required to boil $100 \,g$ of water
$=540 \times 4.2 \times 100 / 1080 $
$=210\, s$
Was this answer helpful?
0
0
Top Questions on Electromagnetic induction
- In Fleming’s left hand rule, the forefinger gives:
- CBSE Class X - 2024
- Electronics and hardware
- Electromagnetic induction
- A rectangular loop of length 2.5 m and width 2 m is placed at 60° to a magnetic field of 4 T. The loop is removed from the field in 10 sec. The average emf induced in the loop during this time is:
- JEE Main - 2024
- Physics
- Electromagnetic induction
- Let us consider two solenoids A and B, made from same magnetic material of relative permeability \(µ_r\) and equal area of cross-section. Length of A is twice that of B and the number of turns per unit length in A is half that of B. The ratio of self inductances of the two solenoids, LA : LB is
- NEET (UG) - 2024
- Physics
- Electromagnetic induction
- A step up transformer is connected to an ac mains supply of 220 V to operate at 11000 V, 88 watt. The current in the secondary circuit, ignoring the power loss in the transformer, is
- NEET (UG) - 2024
- Physics
- Electromagnetic induction
- A coil of 200 turns and area $0.20 \, \text{m}^2$ is rotated at half a revolution per second and is placed in a uniform magnetic field of $0.01 \, \text{T}$ perpendicular to the axis of rotation of the coil. The maximum voltage generated in the coil is \[\frac{2\pi}{\beta} \, \text{volt}.\]The value of $\beta$ is:
- JEE Main - 2024
- Physics
- Electromagnetic induction
View More Questions
Questions Asked in BHU UET exam
- Excitation of chlorophyll in light is
- BHU UET - 2012
- Photosynthesis in higher plants
- Triticale, the first man made cereal crop, has been obtained by crossing wheat with
- BHU UET - 2012
- Strategies For Enhancement in Food Production
- In Cycas, dehiscence of microsporangium occurs when pollen grains are at
- BHU UET - 2012
- Kingdom Plant
- Bryophytes are known as amphibians of plant kingdom because
- BHU UET - 2012
- Kingdom Plant
- Potato spindle tuber disease is caused by
- BHU UET - 2012
- biological classification
View More Questions
Concepts Used:
Electromagnetic Induction
Electromagnetic Induction is a current produced by the voltage production due to a changing magnetic field. This happens in one of the two conditions:-
- When we place the conductor in a changing magnetic field.
- When the conductor constantly moves in a stationary field.
Formula:
The electromagnetic induction is mathematically represented as:-
e=N × d∅.dt
Where
- e = induced voltage
- N = number of turns in the coil
- Φ = Magnetic flux (This is the amount of magnetic field present on the surface)
- t = time
Applications of Electromagnetic Induction
- Electromagnetic induction in AC generator
- Electrical Transformers
- Magnetic Flow Meter