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Define the terms threshold frequency and stopping potential in relation to the phenomenon of photoelectric effect. How is the photoelectric current affected on enhancing the
(i) frequency
(ii) intensity of the incident radiations and why?
Functions of the commutator: A commutator is a device, which under certain conditions changes ac into dc and vice versa. The commutator is a form of rotating switch placed
What is the relationship among the period and the square root of the length? The graph is linear, so the period is proportional to the square root of the length of the string.
Q. Compare the emf and the potential difference . Comparison of emf and potential difference 1. The difference of potentials among the two terminals of a cell in an open cir
Can a solid and liquid together be possible? Actually, substances can exist in all three states of matter concurrently if the conditions are right. The triple point of a substa
For the double-beam oscilloscope displays shown in Figure, determine (a) their frequency (b) their r.m.s. values (c) their phase difference. The 'time/cm' switch is on 10
Elasticity is defined as the ability of a solid to return to its original shape even after being expanded or contracted. Elasticity is termed as the property of a solid to return t
Question: For a plane mirror that is true of the normal? Feedback: The usual is an imaginary line that passes through the point of incidence and is perpendicular to
On the planet Newtonia, a simple pendulum having a bob with mass 1.25 kg and a length of 185.0 cm takes 1.42 seconds, when released from rest, to swing through an angle of 12.5 deg
LENZ’S LAW A change of flux in a closed circuit induces an emf and sets up a current. The direction of this current is such that its magnetic field tends to oppose the c
give example phenomena of resonance?
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