EXERCISE 3
W
34
Point out the kind or use of each of the nouns occurring below :
1. Alexander the Great, king of Macedon, was conqueror of Persia.
2. Cows are as fond of grass as babies are of milk. 3. Health is one
of the greatest blessings. 4. Arjun was the bravest of the Pandavas.
5. Kalidas was the Homer of India. 6. Almost every Hindu belongs
to some caste. 7. A shower of rain does not give so much trouble
to a traveller as a fall of snow. 8. During the cricket season our
eleven defeated the teams from several other schools. 9. Some kinds
of food are not conducive to health. 10. The love of money is the
root of all evil; but money properly used may do a great deal of
good. 11. He has done me so many kindnesses that I shall always
remember his name with gratitude. 12. Speech is one of the highest
faculties with which man is endowed. 13. Daniel was a Jewish
prophet. 14. There is no slate in the rocks of these hills. 15. Give
him the slate. 16. Witchcraft is the art practised by a witch or
wizard. 17. Salt is necessary to life. 18. Cleanliness is next to
godliness, 19. He spent his last years in peace and safety. 20. Is that
chain of yours made of gold or brass?
Answers
Answer:
inner 5.12 - 4 into 5 upon 12 - 3 x is equal to 5 upon 12 ki 5 the value of Axiswhen key K is closed, excess charge is maintained by the continuous flow of current.
When key K is open, there is excess charge built up at both ends of the rods.
When key K is closed, excess charge is maintained by the continuous flow of current.
(c)
Magnetic force is cancelled by the electric force set-up due to the excess charge of opposite nature at both ends of the rod.
(d)
Retarding force exerted on the rod, F=IBl
I=e/R=9×10
−3
/9×10
−3
=1A
so, F=1×0.5×0.15=75×10
−3
N
(e)
Retarding force, F=BIl
where, I=e/R=1A
so, F=75×10
−3
N
Also, Power P=Fv=75×10
−3
×0.12=9mW
(f)
Power dissipated = I
2
R=9mW
The source of this power external agent.
(g)
Zero. As, in this case, no emf is induced in the coil because the motion of the rod does not cut across the field lines.
Answer:
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Explanation:
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