x and y are two electron beams moving in the same direction. There will be :
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Three long straight wires are connected parallel to each other across a battery of negligible internal resistance. The ratio of their resistances are 3:4:5. What is the ratio of distances of middle wire from the others if the net forces experienced by it is zero.
04
Sep
Three long straight wires are connected parallel to each other across a battery of negligible internal resistance. The ratio of their resistances are 3:4:5. What is the ratio of distances of middle wire from the others if the net forces experienced by it is zero. A and B are two conductors carrying a current i [...]
A square loop of side a hangs from an insulating hanger of spring balance. The magnetic field of strength B occurs only at the lower edge. It carries a current I . Find the change in the reading of the spring balance if the direction of current is reversed.
04
Sep
A square loop of side a hangs from an insulating hanger of spring balance. The magnetic field of strength B occurs only at the lower edge. It carries a current I . Find the change in the reading of the spring balance if the direction of current is reversed. A and B are two conductors [...]
A fixed horizontal wire carries a current of 200 A. Another wire having a mass per unit length 10−2 kg/m is placed below the first wire at a distance of 2 cm and parallel to is. How much current must be passed through the second wire if it floats in air without any support? What should be the direction of current in it?
04
Sep
A fixed horizontal wire carries a current of 200 A. Another wire having a mass per unit length 10−2 kg/m is placed below the first wire at a distance of 2 cm and parallel to is. How much current must be passed through the second wire if it floats in air without any support? What [...]
A horizontal rod of mass 10 g and length 10 cm is placed on a smooth plane inclined at an angle of 60∘ with the horizontal with the length of the rod parallel to the edge of the inclined plane. A uniform magnetic field induction B is applied vertically downwards. If the current through the rod is 1⋅73 ampere, the value of B for which the rod remains stationary on the inclined plane is
04
Sep
A horizontal rod of mass 10 g and length 10 cm is placed on a smooth plane inclined at an angle of 60∘ with the horizontal with the length of the rod parallel to the edge of the inclined plane. A uniform magnetic field induction B is applied vertically downwards. If the current through the [...]
A and B are two conductors carrying a current i in the same direction, x and y are two electron beams moving in the same direction. There will be :
04
Sep
A and B are two conductors carrying a current i in the same direction, x and y are two electron beams moving in the same direction. There will be : A and B are two conductors carrying a current i in the same direction x and y are two electron beams moving in the same [...]