Please answer all 3 parts Which of the following statements regarding magnetic f

Question

Please answer all 3 parts Which of the following statements regarding magnetic fields is/are true? a) Magnetic field lines start on north poles and end on south poles b) Like magnetic poles attract each other and unlike magnetic poles repel each other. c) The force that a magnetic field exerts on a charged direction of the magnetic field and the velocity of the particle. d) Magnetic poles ALWAYS come as a pair, i.e. you will never find an isolated monopole. e) A static magnetic field does not do any work on a moving charge. Consider a current carrying circular loop of wire. Which of the following are true. a) The magnetic field at the center of the loop is zero. b) The magnetic field on the axis of the loop is parallel to the axis c) Far from the center loop, the magnetic field is similar to a dipole magnetic field d) The strength of the magnetic field is proportional to the number of turns of wire in the loop. e) The strength of the magnetic field is proportional to the current in the loop Consider an ideal solenoid with length L, radius R, and total number of turns N. Which of the following are true? a) The magnetic field inside of the solenoid is a constant and points along the axis of the solenoid. b) The magnetic field outside of the solenoid is zero. c) The magnetic field inside of the solenoid is a constant and points perpendicular to the axis of the solenoid. d) If we double the length of the solenoid while keeping the total number of turns and the radius constant, the magnetic field inside the solenoid will not change. e) If we double the radius of the solenoid while keeping the total number of turns and the length constant, magnetic field inside the solenoid will not change.

Explanation / Answer

1)True statements are:

a)Magnetic fiels lines start on north and end on south.

c)The magnetic force is perpendicular to voth velocity and magnetic field.

d)The magnetic poles always comes as pair

e)A static magnetic field does not do any work on amoving charge.

2)The true statements are:

(b) ; (d) ; (e)

3)The true statements are:

(a) ; (e)

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