19. एक सीमित तापमान पर आंतरिक अर्धचालक के चालन बैंड में इलेक्ट्रॉनों के पाए जाने की संभावना:-

(1) बैंड गैप बढ़ने के साथ तेजी से घटता है।

(2) बैंड गैप बढ़ने के साथ तेजी से बढ़ता है।

(3) बढ़ते तापमान के साथ कमी।

(4) तापमान और बैंड गैप से स्वतंत्र है।

19. The probability of electrons to be found in the conduction band of an intrinsic semiconductor at a finite temperature :-

(1) decreases exponentially with increasing band gap.

(2) increases exponentially with increasing band gap.

(3) decrease with increasing temperature.

(4) is independent of the temperature and the band gap.

20. पी-टाइप सेमीकंडक्टर में मुख्य रूप से होते हैं:-,

(1) मुक्त इलेक्ट्रॉन

(2) छिद्र

(3) दोनों (1) और (2)

(4) इनमें से कोई नहीं

20. In a p-type semicondutor, there are mainly !

(1) free electrons

(2) holes

(3) both (1) and (2)

(4) none of these

1. एक बल F=(2i-j+4k)N एक कण को ​​d=(3+2j-k)m तक विस्थापित करता है, किए गए कार्य की गणना करें।

(1)शून्य

(2) 8 ज

(3) 4 ज

(4) 12 जे

1. A force F=(2i-j+4k)N displaces a particle upto \overline{d}=(3\hat{i}+2\hat{j}-\hat{k})m , calculate work done.

(1) Zero

(2) 8 J

(3) 4 J

(4) 12 J

.Which country recently ratified the ILO Convention 190 to combat workplace violence and harassment, becoming the first in Asia to do so

1. A force F=(2i-j+4k)N displaces a particle upto \overline{d}=(3\hat{i}+2\hat{j}-\hat{k})m , calculate work done.

(1) Zero

(2) 8 J

(3) 4 J

(4) 12 J

t P, Q, R be three substances. Following
observations were made on rubbing these
substances with each other
Substances
rubbed
Substance
acquiring
+ve charge
Substance
acquiring
–ve charge
(i) P and Q P Q
(ii) P and R R P
What will happen when object made of
substance Q is rubbed against an object made
of substance R?
(1) Q becomes positively charged;
R becomes positively charged
(2) Q becomes positively charged;
R becomes negatively charged
(3) Q becomes negatively charged;
R becomes positively charged
(4) Q becomes negatively charged;
R becomes negatively charged

2. Two charges repel each other with a force of
200 N. One of the charges is increased by 20%
and other is reduced by 20%. The new
repulsive force at same distance would be
(1) 200 N (2) 216 N
(3) 192 N (4) 316 N