Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
A/c toOhm's law
R = `"V"/"I"`
Here V = 0.1 volt and I = 2 A
R = `0.1/2` = 0.05Ω
APPEARS IN
संबंधित प्रश्न
A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω, 0.5 Ω and 12 Ω, respectively. How much current would flow through the 12 Ω resistor?
(i) Two sets A and B, of three bulbs each, are glowing in two separate rooms. When one of the bulbs in set A is fused, the other two bulbs also cease to glow. But in set B, when one bulb fuses, the other two bulbs continue to glow. Explain why this phenomenon occurs.
(ii) Why do we prefer arrangements of Set B for house circuiting?
An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:
(a) 0.92 A
(b) 2.9 A
(c) 9.2 A
(d) 92 A
The substance having infinitely high electrical resistance is called:
(a) conductor
(b) resistor
(c) superconductor
(d) insulator
Give one example to show how the resistance depends on the nature of material of the conductor.
Choose the correct alternative and rewrite the following:
You are given three equal resistances. In how many combinations can they are arranged?
The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?
Write an expression for calculating electrical power in terms of current and resistance.
In the circuit shown below, calculate the equivalent resistance between the points (i) A and B, (ii) C and D.
Two resistors of 4Ω and 6Ω are connected in parallel to a cell to draw 0.5 A current from the cell. Calculate the current in each resistor.
