- Apolarization
- Binterference
- Creflection
- Ddiffraction
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion : Bending a wire does not effect electrical resistance.
Reason : Resistance of wire is proportional to resistivity of material.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
Assertion : Neutral temperature of a thermocouple does not depend upon temperature of cold junction.
Reason : Its value is constant for the given metals of the couple.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
The resistivity of a wire
|
(a) Increases with the length of the wire |
|
(b) Decreases with the area of cross-section |
|
(c) Decreases with the length and increases with the cross-section of wire |
|
(d) None of the above statement is correct |
The cut-in voltage for silicon diode is approximately
| (a) 0.2 V | (b) 0.6 V | (c) 1.1 V | (d) 1.4 V |
The particle that possesses half integral spin as
|
(a) Photon |
(b) Pion |
(c) Proton |
(d) K-meson |

A circular disc is placed in front of a narrow source. When the point of observation is at a distance of 1 meter from the disc, then the disc covers first HPZ. The intensity at this point is I0. The intensity at a point distance 25 cm from the disc will be
|
(a) |
(b) |
(c) |
(d) |