COMEDK 2022 | Electromagnetic Induction Question 14 | Physics

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5 A, then the average force on each electron in the coil due to the magnetic field is

$$2.5\times10^{-25}$$ N

$$4.5\times10^{-25}$$ N

$$5\times10^{-25}$$ N

$$5.5\times10^{-25}$$ N

COMEDK 2020

MCQ (Single Correct Answer)

-0

A coil of wire of a certain radius has 100 turns and a self inductance of 15 mH. The self inductance of a second similar coil of 500 turns will be

75 mH

375 mH

15 mH

None of the above

COMEDK 2020

MCQ (Single Correct Answer)

-0

A coil of 100 turns carries a current of 5 mA and creates a magnetic flux of 10$$^{-5}$$ Wb. The inductance is

0.2 mH

2.0 mH

0.02 mH

None of these

COMEDK 2020

MCQ (Single Correct Answer)

-0

In step-up transformer, relation between number of turns in primary (N$$_P$$) and number of turns in secondary (N$$_S$$) coils is

N$$_S$$ is greater than N$$_P$$

N$$_P$$ is greater than N$$_S$$

N$$_S$$ is equal to N$$_P$$

N$$_P$$ = 2N$$_S$$

Questions Asked from MCQ (Single Correct Answer)

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