Physics-
General
Easy
Question
The diagram shows a small bead of mass m carrying charge q. The bead can freely move on the smooth fixed ring placed on a smooth horizontal plane. In the same plane a charge +Q has also been fixed as shown. The potential at the point P due to +Q is V. The velocity with which the bead should projected from the point P so that it can complete a circle should be greater than
- none
The correct answer is:
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In space of horizontal EF (E = (mg)/q) exist as shown in figure and a mass m attached at the end of a light rod. If mass m is released from the position shown in figure find the angular velocity of the rod when it passes through the bottom most position
In space of horizontal EF (E = (mg)/q) exist as shown in figure and a mass m attached at the end of a light rod. If mass m is released from the position shown in figure find the angular velocity of the rod when it passes through the bottom most position
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A bullet of mass m and charge q is fired towards a solid uniformly charged sphere of radius R and total charge + q. If it strikes the surface of sphere with speed u, find the minimum speed u so that it can penetrate through the sphere. (Neglect all resistance forces or friction acting on bullet except electrostatic forces)
A bullet of mass m and charge q is fired towards a solid uniformly charged sphere of radius R and total charge + q. If it strikes the surface of sphere with speed u, find the minimum speed u so that it can penetrate through the sphere. (Neglect all resistance forces or friction acting on bullet except electrostatic forces)
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An infinite number of concentric rings carry a charge Q each alternately positive and negative. Their radii are 1, 2, 4, 8...... meters in geometric progression as shown in the figure. The potential at the centre of the rings will be
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A charged particle having some mass is resting in equilibrium at a height H above the centre of a uniformly charged non-conducting horizontal ring of radius R. The force of gravity acts downwards. The equilibrium of the particle will be stable
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A particle of mass m and charge Q is placed in an electric field E which varies with time t ass 
. It will undergo simple harmonic motion of amplitude
A particle of mass m and charge Q is placed in an electric field E which varies with time t ass . It will undergo simple harmonic motion of amplitude
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The given figure shows a network of resistances and a battery.
Identify the correct statement(s)
The given figure shows a network of resistances and a battery.
Identify the correct statement(s)
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The figure shows a tetrahedron, each side of which has a resistance r
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Choose the correct statement(s) related to the resistance between any two points
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Inside a super conducting ring six identical resistors each of resistance R are connected as shown in figure
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Inside a super conducting ring six identical resistors each of resistance R are connected as shown in figure
The equivalent resistance(s)
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The figure shows a network of resistors and a battery. If 1A current flows through the branch CF, then answer the following questions
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The current through
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Consider the circuit shown in the figure
Consider the circuit shown in the figure
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In the circuit shown E, F, G and H are cells of e.m.f. 2V, 1V, 3V and 1V respectively and their internal resistances are 2
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A conductor is made of an isotropic material and has shape of a truncated cone. A battery of constant emf is connected across it and its left end is earthed as shown in figure. If at a section distant x from left end, electric field intensity, potential and the rate of generation of heat per unit length are E, V and H respectively, which of the following graphs is/are correct?
A conductor is made of an isotropic material and has shape of a truncated cone. A battery of constant emf is connected across it and its left end is earthed as shown in figure. If at a section distant x from left end, electric field intensity, potential and the rate of generation of heat per unit length are E, V and H respectively, which of the following graphs is/are correct?
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A metallic conductor of irregular cross-section is as shown in the figure. A constant potential difference is applied across the ends (1) and (2). Then :
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In the given potentiometer circuit, the resistance of the potentiometer wire AB is 
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In the circuit shown the readings of ammeter and voltmeter are 4A and 20V respectively. The meters are non ideal, then R is:
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physics-General
