Physics-
General
Easy
Question
Three identical metal plates with large surface areas are kept parallel to each other as shown in figure. The leftmost plate is given a charge Q, the rightmost a charge -2Q and the middle one remains neutral. Find the charge appearing on the outer surface of the rightmost plate.
The correct answer is:
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Find the potential difference 
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Four identical plates 1,2,3 and 4 are placed parallel to each other at equal distance as shown in the figure. Plates 1 and 4 are joined together and the space between 2 and 3 is filled with a dielectric of dielectric constant k=2. The capacitance of the system between 1 and 3&2 and 4 are 
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A simple electric dipole consists of a positive and negative charge of equal magnitude held very close to one another. The components of the electric field pointing away from a dipole has magnitude. 
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A student performs an experiment to determine if a mystery object is an electric dipole. (The mystery object is only a few millimeters long) Using a sophisticated instrument, the student measures the component of the electric field pointing away from the object, at various distances from the center of the object. By taking each measurement along an imaginary line emanating outward from the center of the mystery object, he ensures that stays the same throughout the experiments. Table 1 shows the electric field be found at various distances.
Consider the electric field produced by a dipole. If the dipole moment and the distance from the dipole are both doubled, while is kept the same, the electric field component pointing away from the dipole decreases by a factor of :
A simple electric dipole consists of a positive and negative charge of equal magnitude held very close to one another. The components of the electric field pointing away from a dipole has magnitude. where is the distance from the center of the dipole to the point in question, is a universal constant and p in the magnitude of the dipole moment vector, which specifics the strength and direction of the dipole. Here, denotes the angle between the dipole moment vector and d, the displacement vector (from the dipole to the point in question).
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Work done to rotate smaller rod through 180° about z-axis
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What is electric dipole moment of system ?
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What is electric dipole moment of system ?
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In the circuit shown in figure : 
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Phase different between and is
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D) voltage drop across resistance is 100 V
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The diagram shows a capacitor C and a resistor R connected in series to an ac source. 
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I) Readings in A and are always in phase
II) Reading in is ahead in phase with reading in
III) Readings in A and are always in phase which of these statements are/is correct
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