A circuit consists of N resistors, all of resistance R, connected as shown below. A potential difference V is applied to the circuit. The equivalent resistance of the circuit is
a.
.
b.
R.
c.
.
d.
NR.
e.
4
NR.
[Ques. 2] A circuit consists of 2N resistors, all of resistance R, connected as shown below. A potential difference V is applied to one end, and the other end is at ground potential. The equivalent resistance of the circuit is
a.
.
b.
R.
c.
.
d.
NR.
e.
2
NR.
[Ques. 3] Which two circuits are exactly equivalent?
a.
A and B
b.
B and C
c.
C and D
d.
D and E
e.
B and E
[Ques. 4] The capacitors are completely discharged in the circuit shown below.
The two resistors have the same resistance R and the two capacitors have the same capacitance C. After the switch is closed, the current
a.
is greatest in
C1.
b.
is greatest in
C2.
c.
is greatest in
R1.
d.
is greatest in
R2.
e.
is the same in
C1,
C2,
R1 and
R2.
[Ques. 5] The battery is disconnected from a series
RC circuit after the capacitor is fully charged and is replaced by an open switch. When the switch is closed,
a.
the current through the resistor is always greater than the current through the capacitor.
b.
the current through the resistor is always less than the current through the capacitor.
c.
the current through the resistor is always equal to the current through the capacitor.
d.
the capacitor does not allow current to pass.
e.
the current stops in the resistor.
[Ques. 6] The circuit below contains 5 identical light bulbs. The emf is 110 V. Which light bulb(s) is(are) brightest?
a.
A: The one closest to the positive terminal of the battery.
b.
A and C: The bulbs closest to the positive terminal of the battery.
c.
A and B: Because they are closest to the terminals of the battery.
d.
C and D: Because they receive current from A and B and from E.
e.
E: Because the potential difference across E is that of the battery.
[Ques. 7] Which of the identical light bulb(s) is(are) brightest when the capacitor has half its maximum charge?
a.
A
b.
B
c.
C
d.
A and B
e.
All three are equally bright.
[Ques. 8] The circuit below contains 3 100-W light bulbs and a capacitor. The emf is 110 V. Which light bulb(s) is(are) brightest? (Assume the capacitor is fully charged.)
a.
A
b.
B
c.
C
d.
A and B
e.
All three are equally bright.
[Ques. 9] The circuit below contains 4 100-W light bulbs. The emf is 110 V. Which light bulb(s) is(are) brightest?
a.
A
b.
B
c.
C
d.
D
e.
C and D
[Ques. 10] The circuit below contains 4 100-W light bulbs. The emf is 110 V. Which light bulb(s) is(are) brightest?
a.
A
b.
B
c.
C
d.
D
e.
C and D
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