Advertisements
Advertisements
Question
Three heaters each rated 250 W, 100 V are connected in parallel to a 100 V supply. The resistance of each heater
Advertisements
Solution
Given ,
Power , P = 250 W
Voltage , V = 100 V
Resistance for each heaters `"R" = "V"/"I"`
`= 100/2.5 = 40 Omega`
RELATED QUESTIONS
If 20 C of charge pass a point in a circuit in 1 s, what current is flowing?
What is an Ammeter? How is It Connected in a Circuit? Draw a Diagram to Illustrate Your Answer.
A 5 V battery is connected to two 20 Ω resistors which are joined together in series.
(a) Draw a circuit diagram to represent this. Add an arrow to indicate the direction of conventional current flow in the circuit.
(b) What is the effective resistance of the two resistors?
(c) Calculate the current that flows from the battery?
(d) What is the p.d. across each resistor?
Calculate the effective resistance between the points A and B in the network shown below in Figure 8.45
A cell supplies a current of 1.2 A through two 2 Ω resistors connected in parallel. When the resistors are connected in series, it supplies a current of 0.4 A. Calculate:
(i) the internal resistance and (ii) e.m.f. of the cell.
Tick(✓) the correct choice in the following:
A three pin plug is connected to the lead for a 1 kW electric iron to be
used on a 250 V supply. Which of the following statements is not correct?
An electric bulb is rated '100 W, 250 V'. How much current will the bulb draw if connected to a 250 V supply?
State the condition when it is advantageous to connect cells in parallel.
