Important Questions for Class 12 Physics HSC Board. We covered all the Important Questions for Class 12 Physics HSC Board in this post for free so that you can practice well for the exam.
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Important Questions for Class 12 Physics HSC Board MCQs for Students
The capacity of a parallel plate condenser depends on
(A) the area of each plate
(B) the dielectric medium between the plates
(C) the distance between the plates
(D) all of these
Option d – all of these
The capacitance of the parallel plate condenser does not depend upon
(A) the area of the plates
(B) the metal of the plates
(C) the medium between the plates
(D) the distance between the plates
Option b – the metal of the plates
The capacity of a parallel plate condenser is 5 μF. When the distance between plates is halved, its capacity becomes :
(A) 2.5 μF
(B) 5 μF
(C) 10 µF
(D) 7.5 µF
Option c – 10 µF
Let C be the capacitance of a capacitor discharging through a resistor R. Suppose t₁ is the time taken for the energy stored in the capacitor to reduce to half its initial value and so is the time taken for the charge to reduce to one-fourth of its initial value. Then the ratio t₁/t₂ will be
(A) 2
(B) 1/2
(C) 1
(D) 1/4
Option d – 1/4
Two charges are placed at a distance, if a glass slab is placed between them then the force between them will :
(A) decrease
(B) increases
(C) remains the same
(D) becomes infinite
Option a – decrease
To reduce the capacity of a parallel plate condenser we shall find that the separation between the plates is :
(A) reduced and the area of plates is increased
(B) decreased and the area of plates is decreased
(C) increased and the area of plates is increased
(D) increased and the area of plates is decreased
Option d – increased and the area of plates is decreased
A parallel plate condenser has a capacitance of C. If the distance between the plates is doubled, the new capacity will be :
(A) 2 C
(B) C/2
(C) C/4
(D) C
Option b – C/2
The capacity of a parallel plate condenser can be increased by:
(A) increasing the distance between the plate
(B) decreasing the distance between the plate
(C) increasing the charge on it
(D) decreasing the charge on it
Option b – decreasing the distance between the plate
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