Give the definition of electromotive force of an electric cell in open circuit.
WBBSE
Class X
Physical Science
Current Electricity
2
2022
The electromotive force (emf) of an electric cell in an open circuit is the maximum potential difference between the two terminals of the cell when no current is flowing through the circuit. It represents the total energy provided by the cell per unit charge to move it through the circuit.
Related Questions
More WBBSE Easy level questions
1/12
Q.
Write the names of two national parks of West Bengal.
A.
Sundarban National Park and Jaldapara National Park. Explanation: Sundarban is famous for...
Q.
Write one function each of chromoplast and Golgi apparatus.
A.
Chromoplast – provides color to fruits and flowers. Golgi apparatus – helps...
Q.
Write the names of two non-nitrogenous waste products of plants.
A.
Carbon dioxide and water vapor. Explanation: During respiration and transpiration, plants release...
Q.
Write the names of two structural parts of axon.
A.
Two parts are: Axon hillock Myelin sheath Explanation: The axon hillock is...
Q.
What might be the environmental causes behind asthma?
A.
Asthma can be caused by environmental factors such as air pollution, dust,...
Q.
Explain the following two terms related with heredity — (a) Allele (b) Locus
A.
(a) Allele: Alleles are different forms of the same gene that occupy...
Q.
‘Scarcity of food and poaching are two main reasons behind the endangeredness of a mammal...
A.
Scarcity of food limits the survival and reproduction of mammals, weakening their...
Q.
Explain the causes of endangeredness of Polar Bear and Gangetic Dolphin.
A.
The Polar Bear is endangered mainly due to global warming causing melting...
Q.
What environmental problems can originate if the concentration of different greenhouse gases polluting air increases...
A.
An increase in greenhouse gases causes global warming, leading to climate change,...
Q.
Prepare a list of reactants used and products in the experiment of Miller and Urey...
A.
Reactants Products Methane (CH4) Organic compounds Ammonia (NH3) Amino acids Hydrogen (H2)...
Q.
How does a Rohu fish float and sink in water?
A.
A Rohu fish floats and sinks in water by regulating the volume...
Q.
What types of struggle for existence can be found among the animals of a forest...
A.
The types of struggle for existence among forest animals over eating meat...