The following choices refer to a circuit
consisting of a resistor and a battery.
(A)
It is doubled
(B)
It is quadrupled
(C)
It is halved
(D)
It is quartered
(E)
It remains the same
1.
What happens to the current in
the resistor when the voltage is doubled and the resistance remains the
same?
2.
What happens to the power dissipated
in the resistor when the resistance is quadrupled and the voltage
remains constant?
3.
Which
of the following affects the resistance of a wire?
I. The material from which it is made
II. The length of the wire
III. The diameter of the wire
(A)
I only
(B)
II only
(C)
I and II only
(D)
I and III only
(E)
I, II, and III
4.
Two
resistors, and , are identical, but the potential difference
across is half the potential difference
across . What is the ratio of
the current in to the current in ?
(A)
(B)
(C)
1
(D)
2
(E)
4
Questions 5 and 6 refer to two identical
resistors, arranged in parallel.
5.
If a third
identical resistor is added in parallel, what is the ratio of the
new equivalent resistance to the old?
(A)
(B)
(C)
1
(D)
(E)
6.
Assuming
the voltage is kept constant, what is the ratio between the new
current and the old current when a third identical resistor is added
in parallel with the earlier two?
(A)
(B)
(C)
1
(D)
(E)
7.
How
much heat is produced in a 5 resistor in 10 s when a current of 2 A
flows through it?
(A)
2 J
(B)
10 J
(C)
20 J
(D)
100 J
(E)
200 J
8.
Two
identical capacitors are arranged in a circuit. What is the ratio
of the equivalent capacitance of the circuit when the capacitors
are in series to that when they are in parallel?
(A)
(B)
(C)
1
(D)
2
(E)
4
9.
A
potential difference of exists between two plates of a parallel-plate
capacitor with capacitance C. A dielectric with
a dielectric constant of is then placed between the plates of the
capacitor. What is the energy stored in the capacitor?
(A)
(C/)()2
(B)
(/C)()2
(C)
C()2
(D)
C
(E)
(C/)
10.
A
dielectric is inserted into a capacitor while the charge on it is
kept constant. What happens to the potential difference and the
stored energy?
(A)
The potential difference decreases and the stored energy
increases
(B)
Both the potential difference and the stored energy increase
(C)
The potential difference increases and the stored energy
decreases
(D)
Both the potential difference and the stored energy decrease
(E)
Both the potential difference and the stored energy remain
the same
and 
, are identical, but the potential difference
across 
is half the potential difference
across 
. What is the ratio of
the current in 
to the current in 
?
resistor in 10 s when a current of 2 A
flows through it?
exists between two plates of a parallel-plate
capacitor with capacitance C. A dielectric with
a dielectric constant of 
is then placed between the plates of the
capacitor. What is the energy stored in the capacitor?
(C/
)(
)2
(
/C)(
)2
C(
)2
C
(C/
)
