Please select a subject first
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If the inclination is θ, the horizontal component of the earth’s field is HE and the vertical component of the earth’s field is ZE, then tan(θ) is ______.
Concept: undefined >> undefined
According to Einstein’s model minimum energy needed for the electron to escape from a metal surface having work function ϕ0, the electron is emitted with maximum kinetic energy, Kmax = ______.
Concept: undefined >> undefined
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According to Einstein’s model, the threshold frequency for a metal having work function ϕ0 is given by _________.
Concept: undefined >> undefined
According to the Einstein’s model, stopping potential Vo for a metal having work function ϕ0 is given by ______.
Concept: undefined >> undefined
A piece of copper and another of germanium are cooled from room temperature to 77K. The resistance of ______.
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An electric dipole is placed at an angle of 30° to a non-uniform electric field. The dipole will experience ________.
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A conic surface is placed in a uniform electric field E as shown in the figure such that the field is perpendicular to the surface on the side AB. The base of the cone is of radius R, and the height of the cone is h. The angle of the cone is θ.
Find the magnitude of the flux that enters the cone's curved surface from the left side. Do not count the outgoing flux (θ < 45°)
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- In an external electric field, the positive and negative charges of a non–polar molecule are displaced in opposite directions.
- In non –polar molecules displacement stops when the external force on the constituent charges of the molecule is balanced by the restoring force.
- The non–polar molecule develops an induced dipole moment.
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The length of a solenoid is 0.4 m and the number turns in it is 500. A current of 3 amp, is flowing in it. In a small coil of radius 0.01 m and number of turns 10, a current of 0.4 amp. is flowing. The torque necessary to keep the axis of this coil perpendicular to the axis of solenoid will be ______.
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A long straight horizontal cable carries a current of 2.5 A in the direction 10° south of west to 10° north of east. The magnetic meridian of the place happens to be 10° west of the geographic meridian. The earth’s magnetic field at the location is 0.33 Gauss, and the angle of dip is zero. Locate the line of neutral points. (Ignore the thickness of the cable).
Concept: undefined >> undefined
