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Home work 1
1. A circuit is made up from 4 resistors of value 20, 40, 50 and 100 connected in parallel. If
the current is 8.6 A. find the voltage drop across the arrangement and the current in each
resistor (1 decimal place).
2. One resistor group consists of 40, 60 and 80 connected in parallel and a second group
consists of 30 and 60 in parallel. The 2 groups are connected in series across a 24 V supply.
Calculate (a) the circuit current, (b) the P.D. across each group and (c) the current in each
resistor (all 2 decimal places).
3. Two resistors of 60 ks2 and 40 k2 value are connected in series across a 240 V supply and
a voltmeter having a resistance value of 40 k is connected across the 40 ko resistor. What
is the reading on the voltmeter (2 significant figures)?
4. Two groups of resistors A and B are connected in series. Group A consists of 4 resistors of
values 20, 40, 60 and 80 connected in parallel and group B consists of 2 resistors of values
100 and 150 in parallel. If the current in the 40 resistor is 1.5A, calculate (a) the current in
each of the remaining resistors, (b) the supply voltage and (c) the voltage drop across the
groups A and B (all 2 decimal places).
