Advertisements
Advertisements
प्रश्न
उत्तर
A/c to Ohm's law
R = `"V"/"I"`
Here, V = 240 volt and I = 6 A
R = `240/6` = 40 Ω
Thus the resistance of the electriciron is 40 Ω
APPEARS IN
संबंधित प्रश्न
When a 4 Ω resistor is connected across the terminals of a 12 V battery, the number of coulombs passing through the resistor per second is:
(a) 0.3
(b) 3
(c) 4
(d) 12
Choose the correct option from given alternative:
Two bulbs of 100 W and 40 W are connected in series. The current through the 100 W bulb is 1A. The current through the 40W bulb will be:
Why are thick copper wires used as connecting wires?
State the effect of rise in temperature on the resistance of semi-conductors.
How does the resistivity of an alloy such as constantace depends on temperature.
Six resistances are connected together as shown in the figure. Calculate the equivalent resistance between points A and B.
Two lamps of resistance 30Ω and 20Ω respectively are connected in series in a 110V circuit. Calculate:
(i) the total resistance in the circuit
(ii) the current in the circuit, and
(iii) the voltage drop across each lamp.
Two wires of the same length and area made of two materials of resistivity ρ1 and ρ2 are connected in series to a source of potential V. The equivalent resistivity for the same area is:
If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be:
