Answer / 230

power = 100 W,= VI
volts = 230v,
I=V/P;
I=100/230;
=0.4347;
R=V/I;
=230/0.4347;
I=529.1,
NEXT POWER REDUCED TO 35 MEANS, 2.8* R;
=2.85*529.1;
=1507.9 Ohms.
That is 1507.9 Ohms to be increased to get 35 W

Answer / sagar

power P =VI
I = 100/230 = 0.4347A
when there is no addition resistance connectedt,then
R = V/I = 230/0.4347 =529 ohm.


If we want to reduce power to 35 w ,then
I = 35/230 = 0.1521A should be flow
for that value of resistance
R = V/I = 230/0.1521
=1512 ohm.

so,series resistance conneced will be,
= 1512 - 529
= 982 ohm.

Answer / gmpk

dear friend,where is the series resistor in the circuit.

the actual question that what is the resistance between

source and load if the load is 35w instead of 100w.

100/35 is 2.8 times has reduced. so if we multiply the actual

value of resistance will come

Answer / michael

982.4285 ohms

Answer / kalulu

lamp 100W/230v
when resistor R is connected in series with the lamp.
lamp power=35W
lamp Voltage= 230V /* since 230v is the operating voltage of the lamp*/
series current = 35/230
=0.152 A
power dissipated at a resistor = 100 W -35 W
= 65 W
= Isqr X R
R= 65/(0.152sqr)
= 2.8 kilo-ohm

Answer / lakshmikandhan.v

813.8 ohm

Answer / anand pathak

813.8

Answer / ashok naik

64.5w

what is fuction static switch in ups and tell me use parts name and fucion

3 Answers   Dalkia,

What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)

0 Answers   Equate,

can u guys pls suggest a good material for learning abt switch yard and its components

2 Answers  

in 5 mva transformer 33/11 kv s/s what rating of capacitor bank is required & what is the fourmula for rating

6 Answers  

I have 2 KW electric water heater.I am gonna use it in controlling water temp.so I needed to increase or decrease the heating capacity.is there any electrical-electronic circuit for varying the resistance & so current?

1 Answers  

WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

Types of 132KV and 222 KV protection.

1 Answers  

what happens when series resonance occurs?

0 Answers  

how to caculate cable size for diff types of loads? if anyone know the calculating procedure please tell me

0 Answers  

what is the difference between LATCH and FLIP FLOP

4 Answers   Wipro,

why hv current transformers have big size ?

5 Answers   RailTel, TCS,

What is kirchoff ’s current law (kcl)?

0 Answers