Questions in emi

Select	Question
	A conducting square loop of side l and resistance $R$ moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane at the loop exists everywhere with half the loop outside the field, as shown in figure. The induced e.m.f. is
	A wheel with ten metallic spokes each 0.50 m long is rotated with a speed of 120 rev/min in a plane normal to the earth’s magnetic field at the place. If the magnitude of the field is 0.4 Gauss, the induced e.m.f. between the axle and the rim of the wheel is equal to
	A metal rod of length 2 m is rotating with an angular velocity of 100 rad/sec in a plane perpendicular to a uniform magnetic field of 0.3 T. The potential difference between the ends of the rod is
	The wing span of an aeroplane is $20 metre$. It is flying in a field, where the vertical component of magnetic field of earth is $5 \times 10^{–5}$ tesla, with velocity $360$ km/h. The potential difference produced between the blades will be
	A horizontal straight conductor kept in north-south direction falls under gravity, then
	A rectangular coil of 300 turns has an average area of average area of $25\;cm \times 10\;cm.$ The coil rotates with a speed of 50 cps in a uniform magnetic field of strength $4 \times {10^{ - 2}}T$ about an axis perpendicular of the field. The peak value of the induced e.m.f. is (in volt)
	A rod of length 20 cm is rotating with angular speed of 100 rps in a magnetic field of strength 0.5 T about it’s one end. What is the potential difference between two ends of the rod
	A circular metal plate of radius R is rotating with a uniform angular velocity $\omega $ with its plane perpendicular to a uniform magnetic field B. Then the emf developed between the centre and the rim of the plate is
	A circular coil of mean radius of 7 cm and having 4000 turns is rotated at the rate of 1800 revolutions per minute in the earth's magnetic field (B = 0.5 gauss), the maximum e.m.f. induced in coil will be
	One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field $B$ is perpendicular to the plane of the figure. If each tube moves towards the other at a constant sped $v$ then the emf induced in the circuit in terms of $B$, $l$ and $v$ where $l$ is the width of each tube, will be

Previous 1 ... 8 9 10 11 12 ... 30 Next

View Selected Questions (0)

Back to Categories