Question 6 a) A coil of inductance 159.2mH and resistance 202 is connected in series with a 60 Q resistor to a 240 V, 50 Hz supply. Determine (i) the impedance of the circuit, (ii) the current in the circuit, (iii) the circuit phase angle, (iv) the p.ds. across the 60N resistor and the coil.

Physics for Scientists and Engineers, Technology Update (No access codes included)
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Chapter33: Alternating Current Circuits
Section: Chapter Questions
Problem 33.5OQ
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Question 6
a) A coil of inductance 159.2mH and resistance 202 is connected in series with a
60 N resistor to a 240 V, 50 Hz supply. Determine (i) the impedance of the
circuit, (ii) the current in the circuit, (iii) the circuit phase angle, (iv) the p.ds.
across the 602 resistor and the coil.
b) A platinum coil has a resistance of 3.146 at 40°C and 3.767 at 100°C. Find
the resistance at 0°C and the temperature -coefficient of resistance at 40°C.
c) Two batteries A and B are connected in parallel and load of 102 is connected
across their terminals. A has an e.m.f of 12V and an internal resistance of 2 Q; B
has an e.m.f of 8V and internal resistance of 1 2. Use Kirchhoff's laws to
determine the values of currents flowing in each of the batteries and external
resistance. Also determine the potential difference across the external resistance.
Transcribed Image Text:Question 6 a) A coil of inductance 159.2mH and resistance 202 is connected in series with a 60 N resistor to a 240 V, 50 Hz supply. Determine (i) the impedance of the circuit, (ii) the current in the circuit, (iii) the circuit phase angle, (iv) the p.ds. across the 602 resistor and the coil. b) A platinum coil has a resistance of 3.146 at 40°C and 3.767 at 100°C. Find the resistance at 0°C and the temperature -coefficient of resistance at 40°C. c) Two batteries A and B are connected in parallel and load of 102 is connected across their terminals. A has an e.m.f of 12V and an internal resistance of 2 Q; B has an e.m.f of 8V and internal resistance of 1 2. Use Kirchhoff's laws to determine the values of currents flowing in each of the batteries and external resistance. Also determine the potential difference across the external resistance.
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