Advertisements
Advertisements
Question
A switch must be connected in ______.
Options
Live wire
Earth
Neutral
Both Live wire and Earth
Advertisements
Solution
A switch must be connected in live wire.
Explanation:
A switch must be connected in live wire, so that when it is in 'off' position, the circuit is incomplete and no current reaches the appliance through the live wire.
APPEARS IN
RELATED QUESTIONS
Which particles constitute the electric current in a metallic conductor?
For a heater rated at 4 kW and 220 V, calculate:
(a) the current,
(b) the resistance of the heater,
(c) the energy consumed in 2 hours, and
(d) the cost if 1 kWh is priced at Rs 4.60.
The work done in moving unit positive charge across two points in an electric circuit is a measure of
An electric kettle has a heating element which is rated at 2 kW when connected to a 250 V electric supply. Calculate the
(a) Current which flows in the element when it is connected to a 250 V supply,
(b) Resistance of the filament,
(c) Heat produced in 1 minute by the element,
(d) Cost of running the kettle for 10 minutes a day for 30 days of the month, at the rate of Rs. 3.00 per unit.
Define the term kilowatt - hour and state its value in S.I. unit.
An electric bulb is rated at 220 V, 100 W.
- What is its resistance?
- What safe current can be passed through it?
Three heaters each rated 250 W, 100 V are connected in parallel to a 100 V supply. The resistance of each heater
State expression for Cells connected in series.
Conventional current is defined as the direction in which which type of charge would flow?
