Question

Answer all the 3 questions.

Answer 1

hey mate

here is your answer

129- v of the coil=200 v
I in the coil=10A

therefore, r of the coil=v/I
=200/10
=20 ohm

the equivalent resistance of 20 Ohm, 60 ohm and 35 ohm

=1÷(1/20+1/60)+35
=1÷1/15+35
=15+35
=50

the current in the circuit=200/50

=4A

hence the heat energy=i²rt
=(4)²*50*5*60
=4²*50*300
=16*50*300
=540000
=5.4*10^5 j

130-the equivalent resistance of 40 Ohm 60 ohm and 50 Ohm=150 ohm

the potential difference=200 v

therefore the current=200/150

=4/3

131-when the object has covered half way
then half of its kinetic energy gets converted into potential energy

hence kinetic energy =1/2 of potential energy
800=1/2*mgh
1600=500/1000*10*h
1600=5*h
h=320 m (answer)

Answer 2

1) option c

2)option b

3)option a

have a nice day:)