Physics MCQ on Electromotive Force (EMF) for NEET, JEE, Medical and Engineering Exam 2021
MCQ on Electromotive Force (EMF) : Previous trends reveal that NEET/JEE aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations.
In this post we are providing you MCQ on Electromotive Force (EMF) , which will be beneficial for you in upcoming NEET, AIIMS, JEE, WBJEE, Medical and Engineering Exams.
MCQ on Electromotive Force (EMF)
Q1. Which is the property of a coil by which a counter emf is induced when the current through the coil changes? (a) Self-inductance
a) Self-inductance
b) Mutual inductance
c) Capacitance
d) None of these
Q2. Whenever there is a change in magnetic flux with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s _______. (a) first law
a) first law
b) third law
c) second law
d) fourth law
Q3. Statically induced emf’s magnitude depends on the _______. (a) Rate of change of flux
a) Rate of change of flux
b) Coil resistance
c) Flux magnitude
d) None of these
Q4. The flux used in the equation for the calculation of induced emf in a transformer is in its _______. (c) Maximum value
a) RMS value
b) Average value
c) Maximum value
d) Twice that of the maximum value
Q5. In which device is the principle of statically induced emf used? (a) Transformer
a) Transformer
b) Motor
c) Generator
d) Battery
Q6. Principle of dynamically induced emf is used in a _______. (c) Generator
a) choke
b) Transformer
c) Generator
d) Thermo -couple
Q7. What should be the value of primary to the secondary ratio for a transformer to be an isolation transformer? (a) Equal to one
a) Equal to one
b) Less than one
c) More than one
d) Equal to 0.5
Q8. Who introduced the right-hand rule for determining the direction of the induced EMF? (a) Fleming
a) Fleming
b) Lenz
c) Maxwell
d) Faraday
Q9. Power of battery having emf E1=20V is _______. (a) 44.2 Watt
a) 44.2 Watt
b) 30.8 Watt
c) 13.4 Watt
d) 20 Watt
Q10. The average emf induced per turn in a transformer is given by _______. (c) 4f Φm
a) 1.11f Φm
b) 0.5f Φm
c) 4f Φm
d) 8f Φm
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