# Ohms Law for a Magnetic Circuit mcq

## Ohms Law for a Magnetic Circuit mcq

Ohm’s Law for a magnetic circuit relates which two variables?
a) Voltage and resistance
b) Current and resistance
c) Magnetic field strength and resistance
d) Magnetomotive force and reluctance

Ohm’s Law for a magnetic circuit states that the current in a magnetic circuit is:
a) Directly proportional to the magnetic field strength
b) Inversely proportional to the magnetic field strength
c) Directly proportional to the reluctance
d) Inversely proportional to the reluctance
Answer: a) Directly proportional to the magnetic field strength

The formula for Ohm’s Law in a magnetic circuit is:
a) I = B/R
b) I = R/B
c) I = B × R
d) I = B/R
Answer: c) I = B × R

In Ohm’s Law for a magnetic circuit, the quantity “I” represents:
a) Voltage
b) Current
c) Magnetic field strength
d) Magnetic flux

In Ohm’s Law for a magnetic circuit, the quantity “B” represents:
a) Voltage
b) Current
c) Magnetic field strength
d) Magnetic flux

In Ohm’s Law for a magnetic circuit, the quantity “R” represents:
a) Voltage
b) Current
c) Magnetic field strength
d) Reluctance

Ohm’s Law for a magnetic circuit is analogous to Ohm’s Law for an electrical circuit because both laws relate:
a) Voltage and resistance
b) Current and resistance
c) Voltage and current
d) Voltage and capacitance

The unit of measurement for resistance in a magnetic circuit is:
a) Tesla
b) Henry
c) Ampere
d) Ohm

The unit of measurement for magnetic field strength in Ohm’s Law for a magnetic circuit is:
a) Tesla
b) Henry
c) Ampere
d) Ohm

The unit of measurement for current in Ohm’s Law for a magnetic circuit is:
a) Tesla
b) Henry
c) Ampere
d) Ohm

The resistance in a magnetic circuit is determined by the:
a) Magnetic field strength
b) Current
c) Length and cross-sectional area of the magnetic circuit
d) Permeability of the magnetic material
Answer: c) Length and cross-sectional area of the magnetic circuit

In Ohm’s Law for a magnetic circuit, an increase in magnetic field strength will result in:
a) An increase in current
b) A decrease in current
c) No change in current
d) Insufficient information to determine
Answer: a) An increase in current

In Ohm’s Law for a magnetic circuit, an increase in reluctance will result in:
a) An increase in current
b) A decrease in current
c) No change in current
d) Insufficient information to determine
Answer: b) A decrease in current

Ohm’s Law for a magnetic circuit assumes that the magnetic material behaves:
a) Linearly
b) Non-linearly
c) Capacitively
d) Inductively

Ohm’s Law for a magnetic circuit is applicable to which type of magnetic materials?
a) Ferromagnetic materials
b) Diamagnetic materials
c) Paramagnetic materials
d) All of the above
Answer: d) All of the above

Ohm’s Law for a magnetic circuit is commonly used in the design and analysis of:
a) Transformers
b) Inductors
c) Magnetic sensors
d) All of the above
Answer: d) All of the above

Ohm’s Law for a magnetic circuit can be used to calculate:
a) Magnetic field strength
b) Magnetomotive force
c) Reluctance
d) All of the above
Answer: d) All of the above

In Ohm’s Law for a magnetic circuit, if the resistance is doubled, the current will:
a) Double
b) Halve
c) Remain the same
d) Insufficient information to determine

In Ohm’s Law for a magnetic circuit, if the magnetic field strength is tripled, the current will:
a) Triple
b) Halve
c) Remain the same
d) Insufficient information to determine

Ohm’s Law for a magnetic circuit can be derived from:
b) Ampere’s Law
c) Ohm’s Law for an electrical circuit
d) Gauss’s Law

In Ohm’s Law for a magnetic circuit, the relationship between current and resistance is:
a) Directly proportional
b) Inversely proportional
c) Non-linear
d) Exponential

Ohm’s Law for a magnetic circuit is based on the assumption that the magnetic field is:
a) Uniform
b) Varying
c) Circular
d) Oscillating

Ohm’s Law for a magnetic circuit is valid for:
a) DC circuits only
b) AC circuits only
c) Both DC and AC circuits
d) Neither DC nor AC circuits
Answer: c) Both DC and AC circuits

In Ohm’s Law for a magnetic circuit, the proportionality constant between current and magnetic field strength is:
a) Magnetic permeability
b) Magnetic susceptibility
c) Magnetic flux
d) Magnetic reluctance