Bihar Board (BSEB) - Class 9

Physics (भौतिकी) question bank (Science (विज्ञान - भौतिकी, रसायन, जीवविज्ञान))

Practice 441 free Bihar Board (BSEB) - Class 9 Science (विज्ञान - भौतिकी, रसायन, जीवविज्ञान) - Physics (भौतिकी) questions with answers and step-by-step solutions.

Q1.

भौतिक विज्ञान (बिहार 10वीं बोर्ड): प्रकाश के परावर्तन तथा अपवर्तन में 'गति (Motion)' दर्पण सूत्र क्या है?


(A)
$\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$ (गति (Motion))
(B)
$\frac{{1}}{{v}} - \frac{{1}}{{u}} = \frac{{1}}{{f}}$
(C)
$v + u = f$
(D)
$R = f$
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Q2.

रसायन शास्त्र (Chemical Reactions): रासायनिक अभिक्रिया में 'गति (Motion)' किसका उदाहरण है?


(A)
संयोजन, वियोजन, विस्थापन अथवा द्विविस्थापन अभिक्रिया (गति (Motion))
(B)
केवल भौतिक परिवर्तन
(C)
उत्क्रमणीय क्रिया
(D)
इनमें से कोई नहीं
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