1 kilowatt-hour (kWh), the commercial unit of electrical energy, equals:
A1000 J
B3.6 × 10⁶ J
C1.6 × 10⁻¹⁹ J
D1000 W
Answer & Solution
Correct answer: B. 3.6 × 10⁶ J
1. 1 kWh = 1000 W × 3600 s = 3.6 × 10⁶ J.
2. Your electricity bill is in units of kWh.
3. A 1000 W heater running for 1 hour consumes 1 kWh.
_Source: NCERT Class 10 Science Ch 11 §11.6.2 Commercial Unit of Electric Energy_
Related questions
If the resistance of a component is kept constant and the voltage across it is doubled, thDomestic electrical appliances are connected in parallel rather than in series mainly becaThe commercial unit of electrical energy, '1 unit', isA potential difference of 12 V is applied across a $4\ \Omega$ resistor. The current throuJoule's law of heating states that the heat produced in a resistor isThe electric power dissipated in a resistor can be written asTwo resistors, each of resistance $R$, are connected in parallel. Their equivalent resistaFor resistors in parallel, the reciprocal of the equivalent resistance equals