Download App

Magnetic Effects of Electric Current — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current1 Mark
MCQ
In the followin questions, a statement of Assertion is given by to corresponding statement of Reason. Of the statement mark the correct answer as :
Assertion : In an $AC$ generator slip $-$ rings type of commutator is used.
Reason : Slip $-$ rings are full rings with which the ends of coil are in contact.
  • A
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • ✓
    If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
  • C
    If Assertion is true, but Reason is false.
  • D
    If Assertion is false, but Reason is true.
✓

Answer

Correct option: B.
If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
The two parts $S_1$ and $S_2$ of the split ring are used to act as a commutator to reverse the direction of current in the coil, so they are called the split ring commutator. So, slip rings are used with simple $a.c.$ generators, whereas a commutator is used with $d.c.$ motors.

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

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 : The following chemical equation is an example of thermal decomposition reaction.$2\text{KClO}_3(\text{s})\xrightarrow[\text{Catalyst}]{\text{Heat}}2\text{KCl}(\text{s})+3\text{O}_2(\text{g})$
Reason : Heat gets released in the decomposition reactions.
→
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 : Alkali metals do not form dipositive ions.
Reason : After loss of one electron, alkali metals achieve stable configuration of noble gas.
→
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): Asexual reproduction is a primitive type of reproduction.
Reason (R): Asexual reproduction involves only mitotic cell division.
→
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 $(a), (b), (c)$ and $(d)$ as given below:
Assertion: ln the reaction, $\text{Zn}_\text{(s)}+ 2\text{H}^+_{\text{(aq)}}\rightarrow\text{Zn}^{2+}_{\text{(aq)}} + \text{H}_{2_\text{(g)}}$ zinc acts as an oxidising agent and $H^+$ acts as a reducing agent.
Reason: An oxidising agent accepts electrons while a reducing agent loses electrons.
→
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 : The ratio of plants when Mendel took pea plants with two contrasting characters was $9 : 3 : 3 : 1.$
​​​​​​​Reason : The ratio of plants when Mendel took pea plants with one contrasting character was $1 : 1.$
→
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 : Wild animals have increased greatly in number.
Reason : These wild animals are killed by poaching.
→
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 : Pea plant is considered ideal for hybridisation experiments.
Reason : Pea is self pollinating plant with short life cycle and bears visible contrasting traits.
→
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: Diamond and graphite do not have the same crystal structure.
Reason: Diamond is crystalline while graphite is amorphous.
→
Assertion (A): Each human trait is influenced by both paternal and maternal DNA.
Reason (R): As compared to the father, the mother contributes more amount of genetic material to the child.
→