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General
Easy
Question
The wire loop formed by joining two semicircular sections of radii R1 and R2, carries a current I, as shown. The magnitude of magnetic of field at the centre C is
The correct answer is:
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Four long straight wires are located at the corners of a square ABCD. All the wires carry equal currents. Current in the wires A and B are inwards and in C and D are outwards. The magnetic field at the centre O is along
Four long straight wires are located at the corners of a square ABCD. All the wires carry equal currents. Current in the wires A and B are inwards and in C and D are outwards. The magnetic field at the centre O is along
physics-General
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A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If a steady current I is established in the wire as shown in figure, the loop will.
A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If a steady current I is established in the wire as shown in figure, the loop will.
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The particle shown is negatively charged. What is the direction of force on it due to the magnetic field?
The particle shown is negatively charged. What is the direction of force on it due to the magnetic field?
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A uniform magnetic field 
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A uniform magnetic field exists in the region x > 0. An electron with speed u travels along the +ve x-axis. When the electron emerges out of the field. Its y co-ordinate and speed v will be as
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A straight wire carrying current is parallel to x-axis as shown in the figure. Then
A straight wire carrying current is parallel to x-axis as shown in the figure. Then
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An infinite ladder network consisting of 1
and 2 resistors is shown in the figure. The effective resistance of the network across AB is
An infinite ladder network consisting of 1 and 2 resistors is shown in the figure. The effective resistance of the network across AB is
physics-General
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Two cells with emfs 
are connected as shown. The voltmeter reads 1.45 V. If 
and 
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is
Two cells with emfs are connected as shown. The voltmeter reads 1.45 V. If and be the internal resistance of the cells, then the ratio is
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In the circuit shown in figure, power supplied by the battery is
In the circuit shown in figure, power supplied by the battery is
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All resistance shown in circuit are 2 each. The current in the resistance between D and E is
All resistance shown in circuit are 2 each. The current in the resistance between D and E is
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The equivalent resistance between point A and B is
The equivalent resistance between point A and B is
physics-General
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What is the total resistance across A and B in the circuit
What is the total resistance across A and B in the circuit
physics-General
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The effective resistance between point P and Q of the electrical circuit shown in the figure is
The effective resistance between point P and Q of the electrical circuit shown in the figure is
physics-General
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In the circuit shown in figure, the current in 2 resistor is
In the circuit shown in figure, the current in 2 resistor is
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The resistance across AB is
The resistance across AB is
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In the circuit shown, the ammeter reads 2 A. The resistance of ammeter is negligible. What is the value of R?
In the circuit shown, the ammeter reads 2 A. The resistance of ammeter is negligible. What is the value of R?
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