Random Flashcards
(20 cards)
The total capacitance of capacitors in parallel is calculated by:
A. Sum of individual capacitances
B. Reciprocal of the sum of reciprocals
C. Product over sum
D. Difference of capacitances
A.
When capacitors are connected in series, the total capacitance is:
A. Sum of all capacitances
B. Reciprocal of the sum of reciprocals
C. Sum of voltages
D. Same as individual capacitance
B.
The energy stored in a capacitor is given by:
A. CV
B. QV
C. (1/2)CV²
D. C/V
C.
Which of the following materials is typically used as a dielectric?
A. Copper
B. Aluminum
C. Iron
D. Mica
D.
In a parallel-plate capacitor, increasing the distance between plates will:
A. Increase capacitance
B. Decrease capacitance
C. Have no effect
D. Double the resistance
B.
Magnetic field lines always form:
A. Open curves
B. Straight lines
C. Closed loops
D. Disconnected segments
C.
Magnetic field inside a long straight current-carrying wire can be found using:
A. Gauss’s Law
B. Biot-Savart Law
C. Faraday’s Law
D. Ampere’s Law
D.
Unit of capacitance is:
A. Weber
B. Henry
C. Farad
D. Tesla
C.
A Farad is equivalent to:
A. Coulomb/Volt
B. Volt/Coulomb
C. Ampere·second
D. Henry/second
A.
Unit of magnetic flux is:
A. Henry
B. Tesla
C. Coulomb
D. Weber
D.
Unit of magnetic flux density is:
A. Weber/m²
B. Ampere-turn
C. Tesla
D. Both A and C
D.
A Tesla is equivalent to:
A. Weber/meter
B. Weber/m²
C. Coulomb·meter
D. Newton/Coulomb
B.
Capacitance of a parallel-plate capacitor is directly proportional to:
A. Distance between plates
B. Area of the plates
C. Resistance of material
D. Magnetic field strength
B.
A dielectric increase the capacitance by:
A. Reducing the voltage
B. Increase the area
C. Increasing permittivity
D. Reducing magnetic field
C.
What does magnetic vector potential \vec{A} represent?
A. Magnetic field direction
B. A potential function related to \vec{B}
C. Energy stored in field
D. Magnetic force
B.
Which law uses the line integral of magnetic field around a closed loop?
A. Coulomb’s Law
B. Ampere’s Law
C. Gauss’s Law
D. Biot-Savart Law
B.
Magnetic field intensity \vec{H} is measured in:
A. Tesla
B. Weber
C. A/m
D. N/C
C.
The relationship between \vec{B} and \vec{H} is given by:
A. \vec{B} = \mu \vec{H}
B. \vec{B} = \epsilon \vec{E}
C. \vec{B} = \frac{1}{\mu} \vec{H}
D. \vec{B} = \sigma \vec{E}
A.
Magnetic permeability \mu represents:
A. Ability to resist magnetic field
B. Ability to conduct electricity
C. Ability to store charge
D. Ability to support magnetic field
D.
A magnetic dipole moment is given by:
A. qE
B. IA
C. B\mu
D. QV
B.
