TRUE OF FALSE QUESTIONS ( ) Magnetic poles are always found in pairs. All attemp
ID: 1552456 • Letter: T
Question
TRUE OF FALSE QUESTIONS
( ) Magnetic poles are always found in pairs. All attempts thus far to detect an isolated magnet pole have been failed. ( ) When you cut a magnet into two pieces, one piece will have north pole and the other piece will have the south pole.
( ) Electric current will not be able to generate magnetic field to deflect a compass needle.
( ) Changing the current is a circuit may produce current in a nearby circuit?
( ) Moving a magnet around a circuit can produce current in a nearby circuit.
( ) Around static charges, there are both electric fields and magnetic fields.
( ) Around moving charges, there are both electric fields and magnetic fields.
( ) Magnetic field lines (outside the bar magnet) points toward north pole and way from the south pole.
( ) The Earth’s magnetic field line typically pointing North on the earth surface.
( ) The Earth is a huge permanent magnet, whose South Magnetic Pole is actually around the Earth’s geographic North Pole.
( ) The Earth’s magnetic field is created by a huge magnetic bar inside the Earth. ( ) The Earth’s magnetic field is created by ions and electrons (charges) circulating in the liquid Earth’s core, acting like a loop of current.
( ) A static charge in a magnetic field will experience a force.
( ) Only moving charges can experience force due to a magnetic field.
( ) Both positive and negative charges moving in the same direction in a magnetic field will experience force in the same direction.
( ) Two positive charges moving in opposite directions in a magnetic field will experience force in the same direction.
( ) A positive charge and a negative charge moving opposite directions on the plane perpendicular to the magnetic field will experience magnetic force in the same direction.
( ) The magnetic force is proportional to the B field strength, the amount of charge as well as the speed of the charged particle.
( ) If the velocity vector of the charge makes an angle with the B field, the magnetic force is proportional to cos .
( ) When the charge moves along the direction of the B field, it receives no magnetic force.
( ) When the charge moves along the direction of the B field, it receives the maximum magnetic force.
( ) The magnetic force is along the direction of the charge’s velocity. ( ) The magnetic force is perpendicular to both the B field direction and the charge’s velocity; hence it is proportional to the plane formed by the velocity and B field vector.
( ) When the velocity and B field are perpendicular to each other, the magnetic force is zero.
( ) When the velocity and B field are perpendicular to each other, the magnetic force is maximized.
( ) When a charge moves inside a steady B field, the B field will not do work on the charge, because the magnetic force is perpendicular to its motion direction.
( ) 1 T =1 N/(A m) The SI unit of B field is T, which is called Tesla. 1T =104 G, which is called guass.
Explanation / Answer
(TRUE)-Magnetic poles are always found in pairs. All attempts thus far to detect an isolated magnet pole have been failed.
( TRUE)- When you cut a magnet into two pieces, one piece will have north pole and the other piece will have the south pole.
(FALSE)- Electric current will not be able to generate magnetic field to deflect a compass needle.
( TRUE) Changing the current is a circuit may produce current in a nearby circuit? - THIS is FARADAYS LAw of EM induction.
( TRUE ) Moving a magnet around a circuit can produce current in a nearby circuit.
(FALSE ) Around static charges, there are both electric fields and magnetic fields.
(TRUE ) Around moving charges, there are both electric fields and magnetic fields.
(TRUE ) Magnetic field lines (outside the bar magnet) points toward north pole and way from the south pole.
(TRUE ) The Earth’s magnetic field line typically pointing North on the earth surface.
( FALSE) The Earth is a huge permanent magnet, whose South Magnetic Pole is actually around the Earth’s geographic North Pole.
(FALSE ) The Earth’s magnetic field is created by a huge magnetic bar inside the Earth.
( TRUE ) The Earth’s magnetic field is created by ions and electrons (charges) circulating in the liquid Earth’s core, acting like a loop of current.
(TRUE ) A static charge in a magnetic field will experience a force. As FORCE F = q v B sin theta
(TRUE) Only moving charges can experience force due to a magnetic field.
(FLASE ) Both positive and negative charges moving in the same direction in a magnetic field will experience force in the same direction. THEY GET FORCES IN OPPOSITE DIRECTIONS
(FLASE) Two positive charges moving in opposite directions in a magnetic field will experience force in the same direction.
(TRUE)- A positive charge and a negative charge moving opposite directions on the plane perpendicular to the magnetic field will experience magnetic force in the same direction.
(TRUE)- The magnetic force is proportional to the B field strength, the amount of charge as well as the speed of the charged particle.
(FLASE ) If the velocity vector of the charge makes an angle with the B field, the magnetic force is proportional to cos . IT IS GIVEN BY F = q V B SIN Theta
(TRUE) When the charge moves along the direction of the B field, it receives no magnetic force.
( FALSE) When the charge moves along the direction of the B field, it receives the maximum magnetic force.
(TRUE ) The magnetic force is along the direction of the charge’s velocity.
( TRUE ) The magnetic force is perpendicular to both the B field direction and the charge’s velocity; hence it is proportional to the plane formed by the velocity and B field vector.
( FLASE) When the velocity and B field are perpendicular to each other, the magnetic force is zero.
( TRUE ) When the velocity and B field are perpendicular to each other, the magnetic force is maximized.
(TRUE ) When a charge moves inside a steady B field, the B field will not do work on the charge, because the magnetic force is perpendicular to its motion direction.
( TRUE ) 1 T =1 N/(A m) The SI unit of B field is T, which is called Tesla. 1T =10^4 G, which is called guass.
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