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प्रश्न
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उत्तर
Given, P = 1.5 kW= 1500 W, p.d. = 220 V
We know that,
P=VI
I = `"P"/"V" = 1500/220` = 6.8 A
Thus a fuse of rating 7A may be used with the appliance and it should be connected in the live wire before connectimg it to the appliance.
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संबंधित प्रश्न
Which particles constitute the electric current in a metallic conductor?
(a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel.
(b) In the circuit diagram shown below, find:
(i) Total resistance.
(ii) Current shown by the ammeter A
Draw a circuit diagram showing two lamps, one cell and a switch connected in series.
How can you change the brightness of the lamp?
A cell supplies a current of 1.2 A through two 2 Ω resistors connected in parallel. When the resistors are connected in series, it supplies a current of 0.4 A. Calculate:
(i) the internal resistance and (ii) e.m.f. of the cell.
The diagram shows two ways of connecting three lamps P, Q and R to A.C. supply of 220 V.
60 joules of heat was dissipated in a resistor when 20 C flowed for 5 s. Calculate:
(a) P.d. across the resistor,
(b) Resistance of the resistor, and
(c) Average power dissipated in the resistor.
State whether true or false. If false, correct the statement.
Current can produce magnetic field.
Electric current is defined as:
Conventional current is defined as the direction in which which type of charge would flow?
