Advertisements
Advertisements
प्रश्न
Assertion (A): Copper is used to make electric wires.
Reason (R): Copper has very low electrical resistance.
विकल्प
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false
Advertisements
उत्तर
Both A and R are true and R is the correct explanation of A.
APPEARS IN
संबंधित प्रश्न
Two wires of the same material and same length have radii 1 mm and 2 mm respectively. Compare their resistances.
Resistance of a wire depends on, ______.
Exercise.
The values of current (I) flowing through a resistor for various potential differences V across the resistor are given below. What is the value of resistor?
| I (ampere) | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 |
| V (volt) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 |
An electric bulb is rated ‘240 V, 100 W’.
- What information can you get from the above statement?
- What will happen if this bulb is connected across 220 V?
- Calculate the resistance of the bulb.
- Also find the energy consumed by the bulb in 10 minutes.
What is resistance?
Two conductors of resistance 2 R and R are connected in series in a battery circuit. The ratio of heat developed In them is ______.
Resistors are connected in series if the resistance of the electric circuit is to be ______.
The ______ is the measure of opposition offered by the component to the flow of electric current through it.
Define the term resistance.
Two copper wires are of the same length, but one is thicker than the other. Which wire will have more specific resistance?
