CISCE Board - Class 7

Mechanics, Heat & Electricity question bank (Physics)

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Q1.

Sound & Waves: In 'Physical Quantities and Measurement: Volume, Density, Speed', what wave relationship relates speed $v$, frequency $f$, and wavelength $\lambda$?

(A)
$v = f \cdot \lambda$ (Physical Quantities and Measurement: Volume, Density, Speed)
(B)
$v = \frac{{f}}{{\lambda}}$
(C)
$\lambda = v \cdot f$
(D)
None of these
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Q2.

Electricity & Circuits: According to Ohm's Law in 'Physical Quantities and Measurement: Volume, Density, Speed', current is proportional to:

(A)
Potential difference across the conductor ($I \propto V \implies V = IR$) (Physical Quantities and Measurement: Volume, Density, Speed)
(B)
Resistance directly
(C)
Capacitance only
(D)
None of these
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