Arihant Physics by D.C Pandey

A fuse wire of circular cross-section and having diameter of 0.4 mm, allows 3A of current to pass through it. But if another fuse wire of same material and circular cross-section and having diameter of 0.6 mm is taken, then the amount of current passed through the fuse is? A fuse wire of circular cross-section [...]

The heat produced by the heather of 100 W in 7 min is : The heat produced by the heather of 100 W in 7 min is : December 3, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity , Volume 2 ,

What must be the efficiency of an electric kettle marked 500W, 230V, if the was found to bring 1 kg of water at 15^oC to boiling point in 15 minutes? (given specific heat capacity of water =4200 J/kg^oC) 230V if the was found to bring 1 kg of water at 15^oC to boiling point in [...]

If two identical heaters each rated as (1000W – 220V) are connected in parallel to 220V, then the total power consumed is? If two identical heaters each rated as (1000W - 220V) are connected in parallel to 220V then the total power consumed is? December 3, 2020 Category: Arihant Physics by D.C Pandey , Chapter [...]

The power consumed by the combination, when three electric lamps of 40W, 60W and 100W are connected in parallel, is? 60W and 100W are connected in parallel is The power consumed by the combination when three electric lamps of 40W December 3, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity [...]

A lamp having tungsten filament consumes 50 W. Assume the temperature coefficient of resistance for tungsten is 4.5×10^−3 /^oC and the room temperature is 20^oC. If the lamp burns, the temperature of its filament becomes 2500^oC, then the power consumed at the moment switch is on, is? A lamp having tungsten filament consumes 50 W. [...]

Which bulb will fuse when two bulbs are rated as (25 W and 220 V) and (100 W and 220 V) are connected in series to 40 V ? Which bulb will fuse when two bulbs are rated as (25 W and 220 V) and (100 W and 220 V) are connected in series to [...]

The amount of heat generated in 500Ω resistance, when the key is thrown over from contact 1 to 2, as shown in figure is? as shown in figure is? The amount of heat generated in 500Ω resistance when the key is thrown over from contact 1 to 2 December 3, 2020 Category: Arihant Physics by [...]

A battery of emf E is connected across the circuit. The value of R for which heat generated in the circuit is maximum, is? A battery of emf E is connected across the circuit. The value of R for which heat generated in the circuit is maximum is December 3, 2020 Category: Arihant Physics by [...]

The power consumed by 4 V battery in the circuit as shown is : The power consumed by 4 V battery in the circuit as shown is : December 3, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity , Volume 2 ,