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question_answer1) Which of the following graphs shows the variation of magnetic induction B with distance r from a long wire carrying current [NCERT 1984; MNR 1998; MP PMT 1999]
question_answer2) Two very thin metallic wires placed along X and Y-axis carry equal currents as shown here. AB and CD are lines at \[45{}^\circ \] with the axes with origin of axes at O. The magnetic field will be zero on the line [MP PMT 1995; CBSE PMT 1996]
question_answer3) Two long parallel wires are at a distance 2d apart. They carry steady equal currents flowing out of the plane of the paper, as shown. The variation of the magnetic field B along the line XX? is given by [IIT-JEE (Screening) 2000]
question_answer4) The magnetic field due to a straight conductor of uniform cross section of radius a and carrying a steady current is represented by [AIIMS 2004]
question_answer5) Two parallel beams of protons and electrons, carrying equal currents are fixed at a separation d. The protons and electrons move in opposite directions. P is a point on a line joining the beams, at a distance x from any one beam. The magnetic field at P is B. If B is plotted against x, which of the following best represents the resulting curve
question_answer6) A long thin hollow metallic cylinder of radius 'R' has a current i ampere. The magnetic induction 'B'-away from the axis at a distance r from the axis varies as shown in
question_answer7) The correct curve between the magnetic induction along the axis of a long solenoid due to current flow i in it and distance x from one end is
question_answer8) A particle of charge q and mass m is moving along the \[x\]-axis with a velocity v and enters a region of electric field E and magnetic field B as shown in figure below for which figure the net force on the charge may be zero
question_answer9) A wire carrying a current i is placed in a uniform magnetic field in the form of the curve \[y=a\sin \,\left( \frac{\pi x}{L} \right)\,0\le x\le 2L.\] The force acting on the wire is
question_answer10) The (t ? q) graph for a coil is
question_answer11) A uniform magnetic field B and a uniform electric field E act in a common region. An electron is entering this region of space. The correct arrangement for it to escape undeviated is
question_answer12) If induction of magnetic field at a point is B and energy density is U then which of the following graphs is correct
question_answer13) A thin wire of length l is carrying a constant current. The wire is bent to form a circular coil. If radius of the coil, thus formed, is equal to R and number of turns in it is equal to n, then which of the following graphs represent (s) variation of magnetic field induction at centre of the coil
question_answer14) A current is flowing through a thin cylindrical shell of radius R. If energy density in the medium, due to magnetic field, at a distance r from axis of the shell is equal to U then which of the following graphs is correct
question_answer15) If current flowing through shell of previous objective is equal to i, then energy density at a point distance 2R from axis of the shell varies according to the graph
question_answer16) A circular coil is in y-z plane with centre at origin. The coil is carrying a constant current. Assuming direction of magnetic field at x = ? 25 cm to be positive direction of magnetic field, which of the following graphs shows variation of magnetic field along x-axis
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