Answer:
Manganese (iv )oxide is a slow depolarizer and polarization occurs with a large current, on resting, the depolarization returns the p.d of the dry cell.
That statement is a big fat prevarication.
Magnetic field lines start at one Pole and end at the OTHER one.
Can't say for sure but I think it's a) or c)
The y-component of the force on the particle at the given position is 120 N.
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Electric force on the particle</h3>
The electric force on the particle is determined by applying Coulomb's law and work-energy theorem as shown below;
Fd = W
Where;
- F is the applied force
- d is the distance
- W is potential
F = W/d
F = 60/0.5
F = 120 N
Thus, the y-component of the force on the particle at the given position is 120 N.
Learn more about electric force here: brainly.com/question/20880591
Explanation:
Given that,
Induced emf 
Rate of current = 0.250 A/s
Number of turns =30
(a). We need to calculate the mutual inductance of the pair of coils
Using formula of the mutual inductance




The mutual inductance of the pair of coils is 6.6 mHz.
(b). We need to calculate the flux through each turn
Using formula of flux

Put the value into the formula


The flux through each turn is 
(c). We need to calculate the magnitude of the induced emf in the first coil
Using formula of induced emf



The magnitude of the induced emf in the first coil is 
Hence, This is the required solution.