For two statements are given - one labelled Assertion (A) and the… - Vidyadip

MCQ

For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below:
Assertion : In electric circuits, wires carrying currents in opposite directions are often twisted together.
Reason : If the wire are not twisted together, the combination of the wires forms a current loop. The magnetic field generated by the loop might affect adjacent circuits or components.

✓
Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
B
Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
C
$A$ is true, but $R$ is false.
D
$A$ is false, but $R$ is true.

✓

Answer

Correct option: A.

Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.

If the wires are twisted together, they can be modelled as a single wire carrying current in the opposite directions. ln this model, no magnetic field is induced in the wires which does not affect adjacent circuits.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion - Reasoning (1 Marks)" from Magnetic Effects of Electric Current→Magnetic Effects of Electric Current — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : The image of a virtual object formed by a thin converging lens is always real.
Reason : In the case of a thin lens $\frac{1}{\text{v}}-\frac{1}{\text{u}}=\frac{1}{\text{f}}$

Assertion (A): Sodium metal is stored under Kerosene.
Reason (R): Metallic sodium melts when exposed to air

Assertion (A): Force experienced by moving charge will be maximum if direction of velocity of charge is perpendicular to applied magnetic field.
Reason (R): Force on moving charge is independent of direction of the applied magnetic field.

For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below:
Assertion : Exposure of silver chloride to sunlight for a long duration turns gray due to the formation of silver by decomposition of silver chloride.
Reason : ln this process, sublimation of silver chloride takes place.

For question two statements are given-one labelled
Assertion $(A)$ and the other labelled
Reason $(R).$ Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below:
Assertion: Salt of $KNO _3$ is formed by strong base and weak acid. Reason: Salt of $NH _4 Cl$ is formed by weak base and strong acid.

For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below:
Assertion : The property of beating a metal into sheets is called ductility.
Reason : Gold and silver are most malleable metals.

For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Recycling is the way of managing plastic waste.
Reason : Broken plastic articles are sent to plastic processing units, where they are melted and remolded to make new plastic art ides.

For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Rainbow is an example of the dispersion of sunlight by the water droplets.
Reason : Light of shorter wavelength is scattered much more than light of larger wavelength.

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Leaves are the major photosynthetic organs of a plant.
Reason : They contain chloroplasts.

For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Gases used in cooling devices can lead to depletion of ozone layer of atmosphere.
Reason : Carbon monoxide which is widely used as coolant in refrigerator reacts with ozone and destroys it.