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°)
[1] Electric Charges and Fields
Chapter: [1] Electric Charges and Fields
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Consider the following statements and select the correct option.
- 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.
[2] Electrostatic Potential and Capacitance
Chapter: [2] Electrostatic Potential and Capacitance
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To minimise the power loss in the transmission cables connecting the power stations to homes and factories, the transmission cables carry current ______.
[3] Current Electricity
Chapter: [3] Current Electricity
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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 ______.
[4] Moving Charges and Magnetism
Chapter: [4] Moving Charges and Magnetism
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Magnetic field inside a solenoid is ______.
[4] Moving Charges and Magnetism
Chapter: [4] Moving Charges and Magnetism
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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).
[5] Magnetism and Matter
Chapter: [5] Magnetism and Matter
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The earth’s magnetic field always has a vertical component except at the ______.
[5] Magnetism and Matter
Chapter: [5] Magnetism and Matter
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At magnetic poles, the angle of dip is ______.
[5] Magnetism and Matter
Chapter: [5] Magnetism and Matter
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The strength of the earth’s magnetic field is ______.
[5] Magnetism and Matter
Chapter: [5] Magnetism and Matter
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At the magnetic north pole of the earth, the value of the horizontal component of earth’s magnetic field and angle of dip are respectively.
[5] Magnetism and Matter
Chapter: [5] Magnetism and Matter
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Which of the following is responsible for the earth’s magnetic field?
[5] Magnetism and Matter
Chapter: [5] Magnetism and Matter
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The core of transformer is laminated to reduce ______.
[7] Alternating Current
Chapter: [7] Alternating Current
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A transformer is based on the principle of ______.
[7] Alternating Current
Chapter: [7] Alternating Current
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The transformation ratio in the step-up transformer is ______.
[7] Alternating Current
Chapter: [7] Alternating Current
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Eddy currents in the core of transformer can't be developed by ______.
[7] Alternating Current
Chapter: [7] Alternating Current
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Quantity that remains unchanged in a transformer is ______.
[7] Alternating Current
Chapter: [7] Alternating Current
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The loss of energy in the form of heat in the iron core of a transformer is ______.
[7] Alternating Current
Chapter: [7] Alternating Current
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A transformer is employed to ______.
[7] Alternating Current
Chapter: [7] Alternating Current
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The transformer voltage induced in the secondary coil of a transformer is mainly due to ______.
[7] Alternating Current
Chapter: [7] Alternating Current
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The unit of electric dipole moment is ______.
[1] Electric Charges and Fields
Chapter: [1] Electric Charges and Fields
Concept: undefined >> undefined
