A light bulb rated as 60 W at 220 V has a potential difference of 110 V across its ends. The power dissipated in this light bulb is:
15 W
Explanation: \(P = \left(\frac{V}{V_{\text{rated}}}\right)^2 \times P_{\text{rated}} = \left(\frac{110}{220}\right)^2 \times 60 = \left(\frac{1}{2}\right)^2 \times 60 = 15 \, \text{W}\)
The rule that determines the direction of a magnetic field produced around a straight conductor carrying current is:
'Net metering' is sometimes seen in the news in the context of promoting the
Which of the following household items does NOT use the heating effect of current?
The magnetic field produced by a current-carrying wire at a given point depends on which of the following factors?
If the resistance of a conductor is increased to three times, then the current will be: (voltage V remains constant)