Advertisements
Advertisements
प्रश्न
Three heaters each rated 250 W, 100 V are connected in parallel to a 100 V supply. The resistance of each heater
Advertisements
उत्तर
Given ,
Power , P = 250 W
Voltage , V = 100 V
Resistance for each heaters `"R" = "V"/"I"`
`= 100/2.5 = 40 Omega`
संबंधित प्रश्न
Three 2 V cells are connected in series and used as a battery in a circuit.
What is the p.d. at the terminals of the battery?
One coulomb of charge flows through any cross-section of a conductor in 1 second. What is the current flowing through the conductor?
In the circuit diagram given below, three resistors R1, R2, and R3 of 5 Ω, 10 Ω and 30 Ω, respectively are connected as shown
Calculate:
- current through each resistor.
- total current in the circuit.
- total resistance in the circuit.
(a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel.
(b) In the circuit diagram shown below, find:
(i) Total resistance.
(ii) Current shown by the ammeter A
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
(d) Which circuit would have less current in it?
Which is the better way to connect lights and other electrical appliances in domestic wiring: series circuits or parallel circuits? why?
Consider the circuit given below when A, B and C are three identical light bulbs of constant resistance. 
(a) List the bulbs in order of increasing brightness.
(b) If C burns out, what will be the brightness of A now compared with before?
(c) If B burns out instead, what will be the brightness of A and C compared with before?
A given wire of resistance 1 Ω is stretched to double its length. What will be its new resistance?
Tick(✓) the correct choice in the following:
Which of the following quantities has the same value for all electrical
appliances connected to the ring main circuit in a house?
