Advertisements
Advertisements
प्रश्न
उत्तर
Precautions while using electricity:
(i) One must use wires or cables of current carrying capacity higher than the current which can flow through the circuit while using all appliances.
(ii) An electrical appliance must never be operated (or touched) with wet hands.
APPEARS IN
संबंधित प्रश्न
State the factors on which the strength of electric current flowing in a given conductor depends.
In the circuit diagram given below five resistances of 10 Ω, 40 Ω, 30 Ω, 20 Ω, and 60 Ω are connected as shown to a 12 V battery.
Calculate:
(a) total resistance in the circuit.
(b) total current flowing in the circuit.
An electric current flowing in a wire creates __________ around the wire.
A bulb marked 12 V, 24 W operates on a 12 volt car battery for 20 minutes. Calculate:
(i) The current flowing through it, and
(ii) The energy liberated.
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.
State whether the following statement is True or False:
The SI unit of charge is the coulomb.
Choose the correct option from given alternative:
At the time of short circuit, the electric current in the circuit :
How is direction of current related to the direction of flow of electrons?
Name any two devices, which are working on the heating effect of the electric current.
