Abot plate of an electric oven
connected to 220V line has two
resistance coil A & B, each
of zyr resistance which may
be used separately in series
& Parallel what are the current-
in the 3 cases?
Answers
Given : Supply voltage, V= 220 V
Resistance of one coil, R= 24 Ω
(i) Coils are used separately :
According to Ohm's law,
V= I1R1
Where, I1 is the current flowing through the coil
I1 = V/R1
= 220/24
= 9.166 A
Therefore, 9.16 A current will flow through the coil when used separately.
(ii) Coils are connected in series
Total resistance,
R2 = 24 Ω + 24 Ω = 48 Ω
According to Ohm's law,
V = I2R2
Where, I2 is the current flowing through the series circuit
I2 = V/R2
= 220/48
= 4.58 A
Therefore, 4.58 A current will flow through the circuit when the coils are connected in series.
(iii) Coils are connected in parallel :
Total resistance,
R3 is given as = 1/(1/24)+(1/24)
= 1/(2/24)
= 24/2
= 12 Ω
According to Ohm's law,
V= I3R3
Where,I3 is the current flowing through the circuit
I3 = V/R3
= 220/12
= 18.33 A
Therefore, 18.33 A current will flow through the circuit when coils are connected in parallel.
Answer:
It is the correct answer.
Explanation:
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