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3 resistances of R/2 are connected in star , the magnitude of resistances when connected in delta is
In parallel circuit under resonance
a) current is maximum
b) impedance is minimum
c) voltage magnification takes place
d) current magnification takes place
The resistance of conductor is R. If the conductor length gets doubled and cross section is reduced by half a times then the resistance of conductor is
a).R remains same
b) R gets reduced by 2
c) R increases by 2
d) R increases by 4
In dc motor the motion of conductor is given by
a) Flemming’s right hand rule
b) Fleming’s left hand rule
c) Cork screw rule
A pipe can fill tank in 3 hrs. A hole a bottom of tank can empty the tank in 6 hrs. After ½ hr the hole at the bottom of tank is opened. Find the time taken to fill the tank completely. (Numbers are not accurate. Problem of this model is given)
AB and CD are two chords of a circle. AB=2*CD. The perpendicular distance ofchords AB and CD from the center of the circle are a, b respectively. Express AB in terms of a, b.
A triangle inscribed in a circle is given and asked to find out the angle. (A bit tough question among all the questions)
The size of the room is 120x80 and the size of each tile is 2.4x1.8. Find minimum number of tiles required to cover the floor (number are not accurate)
The fungus in a vessel doubles for every 5minutes.at 3.00 P.M the fungus in the vessel is 120. at what time the fungus rate is 960.
The time taken by boat to row upstream 2km and downstream 6km is same. Calculate the speed of boat in still water.
a) 4kmph b) 8kmph c) 2kmph