Advertisements
Advertisements
प्रश्न
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
विकल्प
Protect the user from electric shock by short circuiting and consequently
breaking the circuit.Prevent the fuse from burning out.
Protect the iron.
Complete the electrical circuit to the iron.
Allow the current to get away.
Advertisements
उत्तर
Protect the user from electric shock by short circuiting and consequently
breaking the circuit.
APPEARS IN
संबंधित प्रश्न
What does an electric circuit mean?
Draw the electrical symbols of the following components and state its use
Wire crossing
If the current through a floodlamp is 5 A, what charge passed in 10 seconds?
(a) 0.5 C
(b) 2 C
(c) 5 C
(d) 50 C
Which effect of current is utilised in an electric light bulb?
Which effect of current is utilised in the working of an electric fuse?
A charge of 80 C flows in a conductor for 2 minutes.
(a) Calculate the current flowing through the conductor.
(b) If the current through a heater is 4 A what charge must be passing in 8 seconds?
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.
Explain with the help of a diagram how does 'short circuiting' occur in an electric kettle.
A battery of e.m.f. 15 V and internal resistance 2 Ω is connected to two resistors of resistances 4 ohm and 6 ohm joined (a) in series. Find in each case the electrical energy spent per minute in 6 Ω resistor.
How is direction of current related to the direction of flow of electrons?
