Question
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.
✓
Answer
- Both A and R are true, and R is the correct explanation of A.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Total internal reflection can take place only if :
A polaroid is placed at $45^{\circ}$ to an incoming light of intensity $\mathrm{I}_0.$ Now the intensity of light passing through polaroid after polarisation would be
→A small block of mass m is kept on a rough inclined surface of inclination $\theta$ fixed in an elevator. The elevator goes up with a uniform velocity v and the block does not slide on the wedge. The work done by the force of friction on the block in time t will be:
→- zero
- $\text{mgvt}\cos^2\theta$
- $\text{mgvt}\sin^2\theta$
- $\text{mgvt}\sin2\theta$
Three charges are placed at the vertices of an equilateral triangle of side $'a\ '$ as shown in the following figure. The force experienced by the charge placed at the vertex $A$ in a direction normal to $BC$ is
→The image distance of an object placed 10 cm in front of a thin lens of focal length + 5 cm is(a) 6.5 cm(b) 8.0 cm(c) 9.5 cm(d) 10.0 cm
As shown in figure a dust particle with mass $m = 5.0 \times 10^{-9}\ kg$ and charge $q_{0 }= 2.0\ n\ C$ starts from rest at point a and moves in $a$ straight line to point $b.$ What is its speed $v $at point $b$?
→A proton and an electron enter a region with equal speed in which a magnetic field is suddenly switched on. The force experienced by them are:
At room temperature, a P-type semiconductor has(a) Large number of holes and few electrons(b) Large number of free electrons and few holes(c) Equal number of free electrons and holes(d) No electrons or holes
Frequency and potential difference of AC sent to homes in India is:
AND gate: