|
Physics 4, Section 2
Quiz 8
Mar 21, 2002
1. The inductance of a multi-turn coil depends on
A) current through coil B) rate of change of current through coil
C) geometry of coil
D) voltage across the coil
2. The unit of inductance (henry) is equivalent to
A) Wb/A B) N/A
C) T/A D) A/T
E) A/Wb
3. Using inductance to shift from measuring flux changes to measuring
current
changes simplifies the use of whose law?
A) Gauss B) Ampere
C) Coulomb D) Faraday
4. What is the energy stored in a solenoidal inductor carrying a steady
current I ?
A) L2I/2 B) IL/2
C) I2L/2
D) I2L2/2
E) 0
5. When a battery (V) is connected across a series R-L combination, the
current
will approach a final value of
A) V/R
B) VR
C) V/L
D) R/L
E) 0
6. If the resistor in the circuit of Question 5 is increased, the
time required for the
current to come close to its final value will
A) increase
B) decrease
C) unchanged
7. The permittivity constant is generally denoted by
A) α
B) ε
C) μ
D) ρ
E)
ω
8. Two identical coils have two different steady currents flowing through
them. If
the current through the first coil is half the current through the
second one, the
emf across the first coil, compared to the emf across the
second, is
A) twice
B) half
C) same
9. If a series combination of a 0.1-H inductor and a 100-ohm resistor is
connected
across a battery, how long will it take for the current to get
within 1% of its final
value?
A) 1
B) 2
C) 3
D) 4
E) 5
ms
10. In the circuit of Question 9, the voltage drop across the
resistor will be
greatest
A) when the battery is first connected
B) a long time after the battery is connected
C) the voltage across the resistor is independent of time
Answers: 1-c, 2-a, 3-d, 4-c, 5-a, 6-b, 7-b, 8-c, 9-e,
10-b
Last modified on April 02, 2002
| 
