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Physics Chapter 12 : Topic 2
Force on a Current-Carrying Conductor
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A current-carrying conductor placed in a magnetic field may experience:
Reasoning: A current-carrying conductor contains moving charges that interact with the magnetic field, producing a magnetic force.
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The force on a current-carrying conductor in a magnetic field is due to the interaction between:
Reasoning: The magnetic field interacts with moving charges that form the electric current.
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A current-carrying wire placed in a magnetic field experiences no force when the wire is:
Reasoning: The magnetic force is zero when the conductor is parallel to the magnetic field lines.
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The force on a current-carrying conductor is maximum when the conductor is:
Reasoning: Maximum force occurs when current direction is at $\mathbf{90}^{\mathbf{o}}$ to the magnetic field.
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The force experienced by a current-carrying conductor in a magnetic field is called:
Reasoning: The force arises from the interaction between current and magnetic field.
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The magnitude of force on a current-carrying conductor is given by:
Reasoning: The magnetic force depends on magnetic field strength, current, length, and angle.
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In the equation $\mathbf{F = BIL}\mathbf{\ sin\ }\mathbf{\theta}$, $\mathbf{(\theta)}$ represents:
Reasoning: The angle between current direction and magnetic field determines the force.
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If the current in a conductor is doubled while other factors remain constant, the magnetic force will:
Reasoning: Force is directly proportional to current $\mathbf{(}\mathbf{F}\mathbf{\propto}\mathbf{I}\mathbf{)}$.
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If the length of a conductor inside a magnetic field is increased, the force on it:
Reasoning: Magnetic force is directly proportional to the length of conductor in the field.
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A conductor carrying current is placed in a uniform magnetic field. If the current direction is reversed, the force direction:
Reasoning: Reversing current reverses the direction of the magnetic force.
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The direction of force on a current-carrying conductor can be found using:
Reasoning: Fleming’s left-hand rule gives the direction of force on a current-carrying conductor.
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According to Fleming’s left-hand rule, the thumb represents:
Reasoning: In Fleming’s left-hand rule, thumb shows the direction of force.
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In Fleming’s left-hand rule, the first finger represents:
Reasoning: The first finger points in the direction of the magnetic field.
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In Fleming’s left-hand rule, the second finger represents:
Reasoning: The second finger indicates the direction of conventional current.
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A current-carrying conductor placed in a magnetic field experiences force because:
Reasoning: Moving charges in the conductor experience magnetic forces.
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A wire carrying current is placed perpendicular to a magnetic field. If the magnetic field strength increases, the force:
Reasoning: Magnetic force is directly proportional to magnetic field strength.
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A current-carrying conductor in a magnetic field will not experience force if:
Reasoning: When current and magnetic field are parallel, $\mathbf{sin\ }\mathbf{0}^{\mathbf{o}}\mathbf{= 0}$, so force is zero.
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A conductor carries a current of $\mathbf{5\ A}$ in a magnetic field of $\mathbf{0.4\ T}$. If the conductor length is $\mathbf{2\ m}$ and is perpendicular to the field, the force is:
Reasoning: $\mathbf{F = BIL}\mathbf{\ sin\ }\mathbf{\theta}\mathbf{= 0.4 \times 5 \times 2 \times 1 = 4\ N}$
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If the angle between current and magnetic field is $\mathbf{30}^{\mathbf{o}}$, the force will be:
Reasoning: Force depends on $\mathbf{sin\ }\mathbf{\theta\ }$; at $\mathbf{30}^{\mathbf{o}}$ it is smaller than at $\mathbf{90}^{\mathbf{o}}$.
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A current-carrying conductor experiences a force in a magnetic field only if:
Reasoning: Both current and magnetic field are necessary for magnetic force.
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If the current in a conductor becomes zero, the magnetic force on it becomes:
Reasoning: Without current, there are no moving charges to interact with the magnetic field.
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The force on a current-carrying conductor is used in the working principle of:
Reasoning: Electric motors use magnetic forces to produce rotational motion.
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Increasing the number of turns in a coil carrying current increases force because it:
Reasoning: More conductor length in the magnetic field increases the total force.
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A conductor experiences a force in a magnetic field, but the force is small. A possible reason is:
Reasoning: A weak magnetic field reduces the magnetic force.
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A current-carrying wire placed in a magnetic field is an example of conversion of:
Reasoning: Magnetic force can produce motion, converting electrical energy into mechanical energy.
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The force on a conductor carrying current depends on:
Reasoning: These factors determine the magnitude of magnetic force.
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If the magnetic field direction is reversed while current remains the same, the force direction:
Reasoning: Reversing the magnetic field reverses the magnetic force direction.
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The magnetic force on a conductor is a result of:
Reasoning: Current produces a magnetic interaction with an external magnetic field.
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A conductor carrying current is placed in a magnetic field. If the conductor is rotated from $\mathbf{90}^{\mathbf{o}}$ to $\mathbf{0}^{\mathbf{o}}$ relative to the field, the force:
Reasoning: Force changes from maximum at $\mathbf{90}^{\mathbf{o}}$ to zero at $\mathbf{0}^{\mathbf{o}}$.
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The force on a current-carrying conductor demonstrates the relationship between:
Reasoning: This phenomenon shows the connection between electric currents and magnetic fields.
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