Electricity WS2

Question-1.Will current flow more easily through a thick wire or a thin wire of the same

material, When connected to the same source? Why?

Question-2. Why are coils of electric toasters and electric irons made of an alloy rather

than a pure metal?

Question-3. How can three resistors of resistances 2Ω , 3Ω and 6Ω be connected to

give a total resistance of (a) 4 Ω (b) 1 Ω

Question-4. What is (a) the highest, (b) the lowest total resistance that can be secured

by combination of four coils of resistance 4 Ω , 8 Ω , 12 Ω , 24 Ω ?

Question-5. An electric iron of resistance 20 Ω takes a current of 5 A. Calculate the heat

developed in 30 s.

Question-6. An electric motor takes 5 A from a 220 V line. Determine the power of the

motor and the energy consumed in 2 hr.

Question-7. Define electric Power. What is its unit?

Question-8. In the given circuit, calculate the current shown by the ammeter and totalresistance of the circuit  if V= 4volts
Question-9. What would be the readings in the ammeter and the voltmeter.(Ans 0.32 A, 3.84 V.)
Question-10In the circuit shown in figure below, calculate (i) the current flowingthrough the arms AB and CDE; (ii) the potential difference across AB,CD and DE.