Magnetic Effect of Electric Current Class 10 MCQ. We covered all the Magnetic Effect of Electric Current Class 10 MCQ in this post for free so that you can practice well for the exam.
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MCQ on Magnetic Effect of Electric Current for Class 10th Class
A negatively charged particle traveling along the y-direction encounters a magnetic field in the x-direction. Its subsequent motion will be
(A) a straight line along the y-direction.
(B) a circle in the xz-plane.
(C) a circle in the yz-plane.
(D) a circle in the xy-plane.
Option c – a circle in the yz-plane.
According to Biot-Savart’s law, the value of the intensity of a magnetic field at a point due to a current-carrying conductor depends
(A) on the value of current.
(B) on a small part of the length of the conductor.
(C) sine of the angle between the element and the line joining the given point to the midpoint of the element.
(D) All of these.
Option d – All of these.
In a cyclotron,
(A) electric and magnetic fields exist throughout.
(B) a magnetic field exists only across the gap between the dees.
(C) an electric field exists only across the gap between the dees.
(D) electric and magnetic fields exist only across the gap between the dees.
Option c – an electric field exists only across the gap between the dees
The direction of the intensity of the magnetic field produced at a point due to an infinite current-carrying conductor will be
(A) along the line joining the point and the wire.
(B) perpendicular to the plane of wire and the point.
(C) parallel to the current.
(D) opposite to the current.
Option b – perpendicular to the plane of wire and the point.
In a cyclotron, the applied magnetic field
(A) increases the speed of particles only.
(B) changes the direction of the particle only.
(C) changes the direction of the particle and increases speed.
(D) neither changes the direction nor increases the speed.
Option b – changes the direction of the particle only.
When the charges stop moving, the magnetic field associated with
(A) decreases gradually to zero.
(B) remains unchanged in a vacuum.
(C) becomes zero almost instantly.
(D) becomes zero after unit time.
Option c – becomes zero almost instantly.
(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
(C) The assertion is True, Reason is False.
(D) The assertion is False, Reason is True.
Option b – The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
If magnetic induction at point P due to a metal wire is found to be zero, then
(A) the point must be lying on the wire.
(B) the point must be lying perpendicular to the wire.
(C) the point must be making an angle of 45° to the current element.
(D) given data is insufficient to conclude.
Option d – given data is insufficient to conclude.
A magnetic field at a point due to the current element of a wire can be increased by increasing current through the wire can be increased without changing any parameters associated with the wire.
(A) (i) is correct
(B) (ii) is correct
(C) (i) and (ii) are correct
(D) neither (i) nor (ii) is correct
Option c – (i) and (ii) are correct
A charged particle moving in a uniform magnetic field loses 80% of its momentum in a collision. What will be the radius of curvature of its path?
(A) 20% of the initial radius
(B) 20% decrease in the initial radius
(C) 40% decrease in the initial radius
(D) 40% of the initial radius
Option a – 20% of the initial radius
Magnetic field induction (B) produced at point P due to wires made up of the same material and length element carrying a current of the same magnitude but having a different area of the cross-section is studied. Then, the linear graph is for
(A) B versus the area of cross-sections.
(B) B versus current density.
(C) B versus reciprocal of volume element.
(D) B versus radius of wires.
Option b – B versus current density.
In a cyclotron, a positively charged particle is accelerated with the help of an oscillating ………. field by making it cross the same field with the help of a strong ………. field.
(A) electromagnetic, magnetic
(B) magnetic, electric
(C) magnetic, electromagnetic
(D) electric, magnetic
Option d – electric, magnetic
Choose the correct statement/s (1) Magnetic lines of force form concentric circles around a long straight current-carrying conductor with the conductor as the axis. (ii) Magnetic lines of force form concentric circles around the current-carrying circular coil with the line passing through the center of the coil and perpendicular to the coil as the axis.
(A) Only (i)
(B) Only (ii)
(C) Both (i) and (ii)
(D) Neither (i) nor (ii)
Option a – Only (i)
Assertion: The energy of charged particles moving in a uniform magnetic field perpendicular to the field is the same. Reason: The velocity of a charged particle in motion remains unchanged.
(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
(C) The assertion is True, Reason is False.
(D) The assertion is False, Reason is True.
Option a – The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
A charged (q) particle moving in a uniform magnetic field (B) experiences force due to ………
(A) charge present on the particle
(B) applied magnetic field (B)
(C) the velocity of charged particle
(D) interaction between the magnetic field produced due to moving charge and applied magnetic field (B)
Option d – interaction between the magnetic field produced due to moving charge and applied magnetic field (B)
Assertion: In electronic experiments, wires are twisted together. Reason: In twisted wires, charged particles go helically.
(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.
(C) The assertion is True, Reason is False.
(D) The assertion is False, Reason is False.
Option d – The assertion is False, Reason is False.
Assertion: The graph of magnetic field induction (B) on the Y-axis and distance (x) of a point on the axis of a circular coil carrying current on the X-axis is symmetric about Y-axis. Reason: The sense of direction for the current element along the circular coil is the same.
(A) Assertion is True, Reason is True; Reason is a correct explanation for Assertion.
(B) Assertion is True, Reason is True; Reason is not a correct explanation for Assertion.
(C) Assertion is True, Reason is False.
(D) The assertion is False, Reason is True.
Option a – Assertion is True, Reason is True; Reason is a correct explanation for Assertion.
Oersted’s experiment proved that the magnetic field on either side of a current-carrying conductor is ………
(A) same and increasing
(B) constant
(C) opposite
(D) same and decreasing
Option c – opposite
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