Current Electricity and Electrical InstrumentHard
Question
The supply voltage to a room is 120V. The resistance of the lead wires is 6Ω. A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb?
Options
A.zero Volt
B.2.9 Volt
C.13.3 Volt
D.10.04 Volt
Solution
So change in voltage = V1 - V2 
10.4 Volt
Create a free account to view solution
View Solution FreeTopic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions
More Current Electricity and Electrical Instrument Questions
In a potentiometer wire experiment the emf of a battery in the primary circuit is 20volt and its internal resistance is ...A potential difference V is applied across a copper wire of diameter d and length L. when only d is doubled, the drift v...On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The resistance of t...In an A.C. circuit, the current flowing in inductance is I= 5 sin (100t - π / 2)amperes and the potential different...An electric circuit consists of a battery emf E = 110 V, and internal resistance is 5Ω and two resistors connected ...