Answers

The Brainliest Answer!
  • Brainly User
2014-06-06T21:27:24+05:30
Okay.. This is an easy task:-

Question a

I = q/t, so 2 = q/300   =>q=600 Amperes [because 5 mins= 300 secs]

Question b

R=rho * l/a
I give you a hint that you need to find new area.

Question c

Given charge is 1.6 Coulomb 
Charge in 1 electron = 1.6 * 10^-19 C
No. of electrons = 1.6 / (1.6*10^-19) = 10^19 Electrons

Question D 

Your question is incorrect, potential difference is measured in Volts, not Watts [you wrote Walts though]. Watt is for power.
So Charge is given as 4C, => Current for 1 sec will be 4 A.
Work done = VIT
here, time [T] = 1, so VIT = 10*4*1= 40 Joules.

Question E

V=IR
=>230=I*1000
=> I = 0.23 A

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