CISCE Board - ICSE Class 9

ICSE Class 9 Physics Core question bank (Physics)

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Q1.

Refraction of Light: In 'Measurements and Experimentation: Vernier Callipers and Screw Gauge', the refractive index $_1\mu_2$ according to Snell's law is:

(A)

$_1\mu_2 = \frac{\sin i}{\sin r} = \frac{v_1}{v_2}$ (Measurements and Experimentation: Vernier Callipers and Screw Gauge)

(B)

$_1\mu_2 = \frac{{\sin r}}{{\sin i}}$

(C)

$_1\mu_2 = \sin(i - r)$

(D)

None of these

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Q2.

Calorimetry: In 'Measurements and Experimentation: Vernier Callipers and Screw Gauge', the Principle of Method of Mixtures states that (assuming no heat loss):

(A)

Heat lost by hot body = Heat gained by cold body ($m_1 c_1 (T_1 - T) = m_2 c_2 (T - T_2)$) (Measurements and Experimentation: Vernier Callipers and Screw Gauge)

(B)

Heat gained is always double

(C)

Total temperature is zero

(D)

None of these

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