1. current flows when one coulomb of charge
passes through a conductor in one second.
An electric circuit is connected using a
cell, a key and a bulb. When the key is Which of the following is correct?
pressed, the bulb glows immediately.
Which statement best explains this (1) Only Student A is correct.
observation?
(2) Only Student B is correct.
(1) Electric charges already present
throughout the conductor begin to drift (3) Both Student A and Student B are
when an electric field is established. correct.
(2) Electrons travel from the cell to the (4) Both Student A and Student B are
bulb with the speed of light and return incorrect.
immediately.
(3) The bulb glows because electrical
energy is stored permanently inside the 4.
connecting wires.
A potential difference of 12 V exists
(4) The cell transfers matter rather than between two points of a conductor. Which
energy through the circuit. statement correctly interprets this
information?
(1) A charge of 1 C gains or loses 12 J of
2. energy while moving between the two
points.
A current of 0.25 A flows through a
conductor for 8 minutes. The amount of (2) A charge of 12 C gains 1 J of energy
charge that passes through any cross- while moving between the two points.
section of the conductor during this
interval is: (3) The conductor must have a resistance
of exactly 12 Ω.
(1) 60 C
(4) Twelve coulombs of charge pass every
(2) 120 C second through the conductor.
(3) 240 C
(4) 480 C 5.
A student performs an experiment to
verify Ohm's law using a nichrome wire.
3. The potential difference across the wire is
increased gradually while the temperature
Two students are discussing electric of the wire is kept nearly constant. The
current. Student A says that electric ratio V/IV/IV/I remains the same for all
current is the rate of flow of electric observations.
charge. Student B says that one ampere
, The observation supports the conclusion The graph indicates that:
that:
(1) current is directly proportional to
(1) the resistance of the conductor remains potential difference under constant
constant under the given physical physical conditions.
conditions.
(2) resistance decreases continuously with
(2) the current through the conductor increase in voltage.
becomes independent of the applied
voltage. (3) current remains constant for all values
of potential difference.
(3) the conductor behaves as a non-ohmic
device. (4) the conductor does not obey Ohm's
law.
(4) the power consumed by the conductor
remains unchanged.
8.
6. Two wires P and Q are made of the same
material and have the same length. The
In an Ohm's law experiment, the voltmeter radius of wire P is twice the radius of wire
reading is doubled while the resistance of Q. Which statement is correct?
the conductor remains unchanged. The
corresponding ammeter reading is (1) Resistance of P is one-fourth that of Q.
expected to:
(2) Resistance of P is twice that of Q.
(1) become half of its original value.
(3) Resistance of P is four times that of Q.
(2) remain unchanged.
(4) Both wires have equal resistance.
(3) become double of its original value.
(4) become four times of its original value.
9.
A metallic wire is stretched to twice its
7. original length without changing its
volume. The resistance of the stretched
A student draws the graph shown below wire becomes:
after performing an Ohm's law experiment.
(1) one-half of its original value.
(2) twice its original value.
(3) four times its original value.
(4) unchanged.
passes through a conductor in one second.
An electric circuit is connected using a
cell, a key and a bulb. When the key is Which of the following is correct?
pressed, the bulb glows immediately.
Which statement best explains this (1) Only Student A is correct.
observation?
(2) Only Student B is correct.
(1) Electric charges already present
throughout the conductor begin to drift (3) Both Student A and Student B are
when an electric field is established. correct.
(2) Electrons travel from the cell to the (4) Both Student A and Student B are
bulb with the speed of light and return incorrect.
immediately.
(3) The bulb glows because electrical
energy is stored permanently inside the 4.
connecting wires.
A potential difference of 12 V exists
(4) The cell transfers matter rather than between two points of a conductor. Which
energy through the circuit. statement correctly interprets this
information?
(1) A charge of 1 C gains or loses 12 J of
2. energy while moving between the two
points.
A current of 0.25 A flows through a
conductor for 8 minutes. The amount of (2) A charge of 12 C gains 1 J of energy
charge that passes through any cross- while moving between the two points.
section of the conductor during this
interval is: (3) The conductor must have a resistance
of exactly 12 Ω.
(1) 60 C
(4) Twelve coulombs of charge pass every
(2) 120 C second through the conductor.
(3) 240 C
(4) 480 C 5.
A student performs an experiment to
verify Ohm's law using a nichrome wire.
3. The potential difference across the wire is
increased gradually while the temperature
Two students are discussing electric of the wire is kept nearly constant. The
current. Student A says that electric ratio V/IV/IV/I remains the same for all
current is the rate of flow of electric observations.
charge. Student B says that one ampere
, The observation supports the conclusion The graph indicates that:
that:
(1) current is directly proportional to
(1) the resistance of the conductor remains potential difference under constant
constant under the given physical physical conditions.
conditions.
(2) resistance decreases continuously with
(2) the current through the conductor increase in voltage.
becomes independent of the applied
voltage. (3) current remains constant for all values
of potential difference.
(3) the conductor behaves as a non-ohmic
device. (4) the conductor does not obey Ohm's
law.
(4) the power consumed by the conductor
remains unchanged.
8.
6. Two wires P and Q are made of the same
material and have the same length. The
In an Ohm's law experiment, the voltmeter radius of wire P is twice the radius of wire
reading is doubled while the resistance of Q. Which statement is correct?
the conductor remains unchanged. The
corresponding ammeter reading is (1) Resistance of P is one-fourth that of Q.
expected to:
(2) Resistance of P is twice that of Q.
(1) become half of its original value.
(3) Resistance of P is four times that of Q.
(2) remain unchanged.
(4) Both wires have equal resistance.
(3) become double of its original value.
(4) become four times of its original value.
9.
A metallic wire is stretched to twice its
7. original length without changing its
volume. The resistance of the stretched
A student draws the graph shown below wire becomes:
after performing an Ohm's law experiment.
(1) one-half of its original value.
(2) twice its original value.
(3) four times its original value.
(4) unchanged.
