Physics, asked by safalbabbar1, 8 months ago

An electric heater which is connected to a 220v supply line has two resistance coil A and B of 24ohm resistance each. these coils can be used separately in series or in parallel. calculte the current drawn when:
a) only one coil A is used
b) coils A and B are used in series
c)coils A and B are used in parallel​

Answers

Answered by sukanyacho535
8

Answer:

Given V=220 V

RA = RB = 24 ohm

(a) Current drawn when only coil A is used:

I = V/RA = 220/24

=9.16 amps

(b) Current drawn when coils A and B are used in series:

Total resistance, R = RA + RB = 24 + 24 = 48 ohms

I = V/R = 220/48

= 4.58 amps

(c) Current drawn when coils A and B are used in parallel:

Total resistance, 1/R = 1/RA + 1/RB = 1/24 + 1/24 = 2/24 = 1/12

R=12 ohms

I = V/R = 220/12

=18.33 amps

Explanation:

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