Question

Q11 Four resistors of 2 ohm each are joined end to end to form a square ABCD. Calculate the equivalent
resistance of the combination between any two adjacent corners.
Q12 A wire of resistance 20 ohm is bent in the form of a circle. What is the effective resistance between
two points at the end of any diameter of the circle ?
Q13 An electric heater of resistance 500 ohm is connected to a main supply for 30 min. if 5 A current flow
through the filament of the heater. calculate the heat energy produced in the heater.
Q14 An electric heater is rated 1 KW, 220 V. Calculate resistance of the heating element.
Q15 Calculate the amount of heat produced in an electric heater of resistance 1000 ohms if 6A current is
"passed through it for 10 min.
Q16 Two lamps, one rated 100W at 220 V and other 40 W at 220 V are coonected in parallel to 220 V mair
supply. Calculate the current drawn from the supply line.
Q17 An electric heater is rated at 2 kW. Calculate the cost of using it for 2 hr daily for the month of
September, if each unit cost 4rs.
Q18 Will current flow easily through a thick wire or thin wire of the same material, when connected to th
same source. Why?
Q19 Judge the equivalent resistance when the following are connected in parallel :
a) 1 ohm and 106
b) 1ohm and 1000 ohm
Q20 How can three resistors of resistances 2ohm , 3ohm and 6 ohm be connected to give a total resistanc
of a) 4 ohm b) 1 ohm ?
Q21 Why does the connecting cord of an electric heater not glow while the heating element does?




can somebody answer all the question it will be very helpful.

thank you.​

Answer 1

Answer:

oh my god such a big question I cannot answer it sorry !!!