Physics II exam review With Complete
Solutions
Cutting a bar magnet near its north end results in a smaller mostly north pole
magnet and a larger mostly south pole magnet. CORRECT ANSWERS False
At a given location the direction of the magnetic field is the direction that the north
pole of a compass points when placed at that location. CORRECT ANSWERS
True
Magnetic field lines can never cross one another. CORRECT ANSWERS True
The magnetic field unlike the electric field is continuous. CORRECT ANSWERS
True
A current carrying wire placed in a magnetic field perpendicular to the wire
experiences a maximum force CORRECT ANSWERS True
A wire carrying a current that placed in a magnetic field will experience a
maximum force if the angle between the direction of the current and the direction
of the magnetic field is 60°. CORRECT ANSWERS False
A charged particle traveling opposite to a magnetic field does not experience a
magnetic force. CORRECT ANSWERS True
In a velocity selector having electric field E and magnetic field B, the velocity
selected for positively charged particles is v = E/B. The formula is the same for a
negatively charged particles. CORRECT ANSWERS True
A rectangular coil carrying a current in a magnetic field will experience a net
torque that will cause the coil to rotate in that field, if the field is not along the coil
axis. CORRECT ANSWERS True
An electric current produces CORRECT ANSWERS magnetic current
,A vertical wire carries a current straight down. To the east of this wire, the
magnetic field points CORRECT ANSWERS south
A current carrying loop of wire lies flat on a table top. When viewed from above,
the current moves around the loop in a counterclockwise sense. What is the
direction of the magnetic field caused by this current, outside the loop? The
magnetic field CORRECT ANSWERS points straight down
A current carrying circular loop of wire lies flat on a table top. When viewed from
above, the current moves around the loop in a counterclockwise sense. What is the
direction of the magnetic field caused by this current, inside the loop? The
magnetic field CORRECT ANSWERS points straight up
A horizontal wire carries a current straight toward you. From your point of view,
the magnetic field caused by this current CORRECT ANSWERS circles the wire
in a counter-clockwise direction.
A square loop of wire carrying a current in a clockwise direction lies in the plane
of the paper. The magnetic field inside the loop is directed CORRECT ANSWERS
into the paper everywhere.
The direction of the force on a current-carrying wire in a magnetic field is
described by which of the following? CORRECT ANSWERS perpendicular to
both the current and the magnetic field
The force on a current-carrying wire in a magnetic field is equal to zero when
CORRECT ANSWERS the current is parallel to the field lines.
A wire is carrying current vertically downward. What is the direction of the force
due to Earth's magnetic field on the wire? CORRECT ANSWERS horizontally
towards the east
, A charged particle is injected into a uniform magnetic field such that its velocity
vector is perpendicular to the magnetic field vector. Ignoring the particle's weight,
the particle will CORRECT ANSWERS follow a circular path.
The electromotive force of a battery is the maximum potential difference between
the terminals of the battery. CORRECT ANSWERS True
As a dry cell ages, its internal resistance goes up. CORRECT ANSWERS True
A series circuit is a current divider and a parallel circuit is a voltage divider circuit.
CORRECT ANSWERS False
Four unequal resistors connected in series have same current but different voltages.
CORRECT ANSWERS True
Four equal resistors connected in series have same current and same voltage across
each resistor. CORRECT ANSWERS True
Kirchhoff's voltage rule is an example of conservation of energy CORRECT
ANSWERS true
An RC circuit is connected across a DC voltage source through an open switch. As
soon as the switch is closed, the capacitor charges linearly as a function of time.
CORRECT ANSWERS false
An RC circuit is connected across a DC voltage source through an open circuit and
a switch. As soon as the switch is closed, the charge on the capacitor increases but
the voltage across it decreases as a function of time. CORRECT ANSWERS False
The potential difference between the terminals of a battery, when no current flows
to an external circuit, is referred to as the CORRECT ANSWERS emf
The potential difference between the terminals of a battery, when current flows to
an external circuit, is referred to as the CORRECT ANSWERS terminal voltage
Solutions
Cutting a bar magnet near its north end results in a smaller mostly north pole
magnet and a larger mostly south pole magnet. CORRECT ANSWERS False
At a given location the direction of the magnetic field is the direction that the north
pole of a compass points when placed at that location. CORRECT ANSWERS
True
Magnetic field lines can never cross one another. CORRECT ANSWERS True
The magnetic field unlike the electric field is continuous. CORRECT ANSWERS
True
A current carrying wire placed in a magnetic field perpendicular to the wire
experiences a maximum force CORRECT ANSWERS True
A wire carrying a current that placed in a magnetic field will experience a
maximum force if the angle between the direction of the current and the direction
of the magnetic field is 60°. CORRECT ANSWERS False
A charged particle traveling opposite to a magnetic field does not experience a
magnetic force. CORRECT ANSWERS True
In a velocity selector having electric field E and magnetic field B, the velocity
selected for positively charged particles is v = E/B. The formula is the same for a
negatively charged particles. CORRECT ANSWERS True
A rectangular coil carrying a current in a magnetic field will experience a net
torque that will cause the coil to rotate in that field, if the field is not along the coil
axis. CORRECT ANSWERS True
An electric current produces CORRECT ANSWERS magnetic current
,A vertical wire carries a current straight down. To the east of this wire, the
magnetic field points CORRECT ANSWERS south
A current carrying loop of wire lies flat on a table top. When viewed from above,
the current moves around the loop in a counterclockwise sense. What is the
direction of the magnetic field caused by this current, outside the loop? The
magnetic field CORRECT ANSWERS points straight down
A current carrying circular loop of wire lies flat on a table top. When viewed from
above, the current moves around the loop in a counterclockwise sense. What is the
direction of the magnetic field caused by this current, inside the loop? The
magnetic field CORRECT ANSWERS points straight up
A horizontal wire carries a current straight toward you. From your point of view,
the magnetic field caused by this current CORRECT ANSWERS circles the wire
in a counter-clockwise direction.
A square loop of wire carrying a current in a clockwise direction lies in the plane
of the paper. The magnetic field inside the loop is directed CORRECT ANSWERS
into the paper everywhere.
The direction of the force on a current-carrying wire in a magnetic field is
described by which of the following? CORRECT ANSWERS perpendicular to
both the current and the magnetic field
The force on a current-carrying wire in a magnetic field is equal to zero when
CORRECT ANSWERS the current is parallel to the field lines.
A wire is carrying current vertically downward. What is the direction of the force
due to Earth's magnetic field on the wire? CORRECT ANSWERS horizontally
towards the east
, A charged particle is injected into a uniform magnetic field such that its velocity
vector is perpendicular to the magnetic field vector. Ignoring the particle's weight,
the particle will CORRECT ANSWERS follow a circular path.
The electromotive force of a battery is the maximum potential difference between
the terminals of the battery. CORRECT ANSWERS True
As a dry cell ages, its internal resistance goes up. CORRECT ANSWERS True
A series circuit is a current divider and a parallel circuit is a voltage divider circuit.
CORRECT ANSWERS False
Four unequal resistors connected in series have same current but different voltages.
CORRECT ANSWERS True
Four equal resistors connected in series have same current and same voltage across
each resistor. CORRECT ANSWERS True
Kirchhoff's voltage rule is an example of conservation of energy CORRECT
ANSWERS true
An RC circuit is connected across a DC voltage source through an open switch. As
soon as the switch is closed, the capacitor charges linearly as a function of time.
CORRECT ANSWERS false
An RC circuit is connected across a DC voltage source through an open circuit and
a switch. As soon as the switch is closed, the charge on the capacitor increases but
the voltage across it decreases as a function of time. CORRECT ANSWERS False
The potential difference between the terminals of a battery, when no current flows
to an external circuit, is referred to as the CORRECT ANSWERS emf
The potential difference between the terminals of a battery, when current flows to
an external circuit, is referred to as the CORRECT ANSWERS terminal voltage
