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Two charges of magnitude +Q and two charges of magnitude q are placed at the opposite corners of a square of side length ‘a’. If the resultant force on a charge Q is zero than
Work done in carrying a charge ‘Q’ from ‘A’ to ‘B’ (as shown in figure) on a circle of radius ‘r’ with a charge ‘Q’ at the centre is
Two spheres having radii of 5 cm and 10 cm bear identical charge of 6.6 nC. Find the potential of spheres after they have been connected by a conductor, assume that the spheres are at large distance from each other
An ideal electrical cell does 5 joule of work in carrying 10 coulomb of charge around a closed circuit. The heat loss or energy consumption in the circuit outside the battery is
A charged particle of mass 0.1 g is in equilibrium in an electric field E = 98 N/C. The charge on the particle is
An electric charge ‘q’ is lying at the open end of a cylindrical vessel. The flux coming out of the cylinder will be
On moving a charge of 20 coulombs by 2cm, 2J of work is done, then the potential difference between the points is
The capacitance of a parallel plate condenser does not depend upon
A semicircular are of radius ‘a’ is charged uniformly and the charge per unit length is . The electric field at its centre is
Which of the following cannot be the units of electric intensity?
Six resistors each of value 10, are connected to a 5 V battery as shown in the figure. The reading of ammeter'A' is
The potential difference between points ‘A’ and ‘B( )' in the figure if R=0.7 is
If 2% of the main current is to be passed through the galvanometer of resistance G. the resistance of shunt required is
The thermo e.m.f. of a thermocouple is given by e = 2164 t  6.2 t^{2} . The neutral temperature and a temperature of inversion are
The relation between Faraday constant F, electron charge e, and Avogadro's Number N is
In the circuit as shown in Fig. The heat produced by 6 resistance due to current flowing in it is 60 calories per second. The heat generated across 3 ohm resistance per second will be
A thin bar magnet of length 2l and breadth 2b, pole strength p and magnetic moment M is divided into four equal parts with length and breadth of each part being half of the original magnet. Then the pole strength of each part is
Susceptibility is positive and small for a ........substance:
A battery of internal resistance 4 ohm is connected to the network of resistance as shown. In the order that the maximum power can be delivered to the network, the value of R in ohm should be :
A capacitor of capacitance 5 μF is connected as shown in the fig. The internal resistance of the cell is 0.5 Ω. The amount of charge on the capacitor plate is : (μC) :
Consider two concentric nonconducting uniformly charged spherical shells of radius 3m and 6m having charges 10 µC and 200 µC respectively. Find the interaction potential energy between two spheres in joules.
Diagram shows a part of circuit. Find V_{B}–V_{A} when current I is 5A and it is decreasing at a rate of 10^{+3} A/s ?
A current of 4 A flows in a coil when connected to a 12 V d.c. source. If the same coil is connected to a 12 V, 50 rad/s, a.c. source, a current of 2.4 A flows in the circuit. Determine the reactance (in Ω) of coil.
357 docs148 tests

357 docs148 tests
