Praveen
18 Nov 2016
Choose the correct option.
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each
| (a) two revolutions | (b) one revolution |
| (c) half revolution | (d) one-fourth revolution |
both AV valves and semilunar valves close
AV valves close and semilunar valves open
both AV valves and semilunar valves open
AV valves open and semilunar valves close
or
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