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प्रश्न
Name two devices which work on the heating effect of electric current.
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उत्तर
The two devices that work on the heating effect of electric current are a bulb and an electric fuse.
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संबंधित प्रश्न
One coulomb charge is equivalent to the charge contained in:
(a) 2.6 × 1019 electrons
(b) 6.2 × 1019 electrons
(c) 2.65 × 1018 electrons
(d) 6.25 × 1018 electrons
By what name is the physical quantity coulomb/second called?
What Makes an Electric Current Flow in a Wire?
A student made an electric circuit shown here to measure the current through two lamps.
Are the lamps in series or parallel?
(a) Are the lamps in series or parallel?
(b) The student has made a mistake in this circuit. What is the mistake?
(c) Draw a circuit diagram to show the correct way to connect the circuit. Use the proper circuit symbols in your diagram.
What happens to the other bulbs in a parallel circuit if one bulb blows off?
The lamps in a house hold circuit are connected in parallel because:
(a) this way they required less current
(b) if one lamp fails the others remain lit
(c) this way they require less power
(d) if one lamp fails the other also fail
State three factors on which the heat produced by an electric current depends. How does it depend on these factors?
State the relation between work, charge and potential difference for an electric circuit.
The diagram shows two ways of connecting three lamps P, Q and R to A.C. supply of 220 V.
Find the effective resistance in the following circuit diagrams (Fig.):
Name the principle on which a transformer works.
What is the function of a step-up transformer?
Three heaters each rated 250 W, 100 V are connected in parallel to a 100 V supply. The resistance of each heater
What should I choose ___________________
b. for getting protection from electric current.
c. to measure the current in the circuit?
My mother was operating washing machine on Sunday morning. Suddenly, she saw a spark coming out of the electric board and the electric current in the house failed. An electrician was called to look into the matter. What should he have noticed.
What is the speed of electric current?
For current to flow, one needs art open circuit.
Calculate the current in a wire if a charge of 1500 coulomb flows through it in 5 minutes.
A continuous and closed path of an electric current is called:
