The battery discussed in the previous question is suddenly disconnected. Is a current induced in the other loop? If yes, when does it start and when does it end? Do the loops attract each other or repel?

Which one of the following pairs of reactantas does not form oxygen when they react with each other ?

12 cells each having the same emf are connected in series and are kept in a closed box. Some of the cells are wrongly connected. This battery is connected in series with an ammeter and two similar cells . The current is 3A when the two cells aid the battery and is 2A when the cells and the battery oppose each other. How many cells in the battery are wrongly connected?

A pilot does not fall down when his aeroplane loops the loop. Why ?

(a) A closed loop is held stationary in the magnetic field between the north and south poles of two permanent magnets held fixed. Can we hope to generate current in the loop by using very strong magnets? (b) A closed loop moves normal to the constant electric field between the plates of a large capacitor. Is a current induced in the loop (i) when it is wholly inside the region between the capacitor plates (ii) when it is partially outside the plates of the capacitor? The electric field is normal to the plane of the loop. (c) A rectangular loop and a circular loop are moving out of a uniform magnetic field region (Fig. 6.8) to a field-free region with a constant velocity v. In which loop do you expect the induced emf to be constant during the passage out of the field region? The field is normal to the loops. (d) Predict the polarity of the capacitor in the situation described by Fig. 6.9.

Two loops are facing each other as shown in Figure. State whether the loops will attract each other or repel each other if current I_1 is increased

A rectangular loop of wire with dimensions shown in figure is coplanar with a long wire carrying current 'I' . The distance between the wire and the left side of the loop is r . The loop is pulled to the right as indicated. What are the directions of the induced current in the loop and the magnetic forces on the left and right sides of the loop when the loop is pulled ?

When air is blown In between two balls suspended close to each other they are attracted towards each other why?

A square metallic loop of side l is placed near a fixed long wire carrying a current i (figure).The loop is moved towards right perpendicular to the wire with a speed v in the plane containing the wire and the loop.The emf induced in the loop when the rear end of the loop is at a distance a=2l from the wire is (mu_(0)iv)/(xpi) .Find out value of x .

The two loops shown in the figure have their planes parallel to each other . A clockwise current flows in the loop X as viewed from X towards Y. The two coils will repel each other if the current in the loop X is :

Two proton beams going in the same direction repel each other whereas two wires carrying currents in the same direction attract each other. Explain.