32. Lenz law is a consequence of what other physical law?
A. Conservation of energy.
Conservation of momentum.
Gauss's law.
Archimedes' principle.
P25x10
-210
Q = 5X20
718
33. The electric field intensity at a point close to a charged conductor situated in air is 9.2 × 10° Vm'.
Calculate the surface charge density.
0.81 aC/m
7.50 μC/m²
68.91 μC/m³
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reva
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D. 75.2 μC/m² 4
34. A capacitor stores charge Q at a potential difference V. What happens if the potential difference applied
to the capacitor by a battery is doubled to 2V?
The capacitance falls to half its initial value, and the charge remains the same.
The capacitance and the charge both fall to half their initial values.
The capacitance and the charge both double.
The capacitance remains the same, and the charge doubles.
35. In a circuit, a current of 13 A passes through an inductor of inductance 0.2 mH. Calculate the energy
in the inductor?
1.69 × 10² J
16.9 × 10² J
16.9 × 102 J
1.69 × 10-2 J
36. The terminal potential difference of a battery is 2.0 V when supplying a current of 3.0 A. If the same
battery supplies a current of
2.0 A at a terminal potential difference of 4.0 V, calculate the electromotive
force of the battery.
4.0 V
6.0 V
2.0 V
8.0 V
​