Advertisements
Advertisements
Question
A simple electric circuit has 24 V battery and a resistor of 60 Ω. What will be the current in the circuit? The resistance of the connecting wires is negligible.
Solution
current = `"potentia difference (V)"/"Resistance (R)"`
Here, V = 24 volt, R = 60 Ω
current = `24/60` = 0.4 A
APPEARS IN
RELATED QUESTIONS
Which of the following is the most likely temperature of the filament of an electric light bulb when it is working on the normal 220 V supply line?
(a) 500°C
(b) 1500°C
(c) 2500°C
(d) 4500°C
An electrical appliance having a resistance of 200Ω is operated at 200 V. Calculate the energy consumed by the appliance in 5 minutes (i) in joules (ii) in kWh.
Define 1 kilowatt hour.
Water in an electric kettle connected to a 220 V supply took 5 minutes to reach its boiling point. How long will it take if the supply voltage falls to 200 V?
What is electric power? State and define its S.I. unit.
An electric heater is rated 220 V, 550 W. What does this statement mean?
An electric heater is rated 220 V, 550 W. Calculate the electrical energy consumed in 3 hours?
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate the resistance of each heater.
Two resistances R1 = 4Ω and R2 = 6Ω are connected in series. The combination is connected with a battery of e.m.f. 6V and negligible resistance. Calculate:
(i) the heat produced per minute in each resistor,
(ii) the power supplied by the battery.
A electric bulb is rate 220 V, 60 W. its electric cell resistance is nearly
