Assertion & Reason Test: Magnetic Effects of Electric Current - 2 - Class 10 MCQ

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : An induced e.m.f. appears in any coil in which the current is changing.

Reason : Self induction phenomenon obeys Faraday’s law of induction.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : The magnetic field is stronger at a point which is nearer to the conductor and goes on decreasing on moving away from the conductor.

Reason : The magnetic field B produced by a straight current carrying wire is inversely proportional to the distance from the wire.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: A direction current flows through a metallic rod, producing a magnetic field only outside the rod.

Reason : There is no flow of charge carriers inside the rod.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : Electric appliances with metallic bodies have three connections, whereas an electric bulb has two pin connections.

Reason : Three pin connections reduce heating of connecting wires.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : When two long parallel wires, hanging freely are connected in series to a battery, they come closer to each other.

Reason : Wires carrying current in opposite direction repel each other

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : A small coil carrying current, in equilibrium, is perpendicular to the direction of the uniform magnetic field.

Reason : Torque is maximum when the plane of coil and direction of the magnetic field are parallel to each other.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Basic difference between an electric line and magnetic line of force is that the former is discontinuous and the latter is continuous or endless.

Reason: No electric lines of force exist inside a charged body but magnetic lines do exist inside a magnet

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : Two bar magnets attract when they are brought near to each other with the same pole.

Reason : Unlike poles will attract each other.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : In Fleming’s Left Hand Rule, the direction of magnetic field, force and current are mutually perpendicular.

Reason : Fleming’s Left hand Rule is applied to measure the induced current.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : No net force acts on a rectangular coil carrying a steady current when suspended freely in a uniform magnetic field.

Reason : Force on coil in magnetic field is always nonzero.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : A proton moves horizontally towards a vertical long conductor having an upward electric current. It will deflect vertically downward.

Reason : Seeing the proton and the conductor from the side of the proton, the magnetic field at the site of the proton will be towards the right. Hence the force will deflect the proton vertically downward.

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : A neutral body may experience a net nonzero magnetic force.

Reason : The net charge on a current carrying wire is zero, but it can experience a force in a magnetic field.