मराठी

Name Two Safety Devices Which Are Connected to the Live Wire of a Household Electric Circuit

Advertisements
Advertisements

प्रश्न

Name two safety devices which are connected to the live wire of a household electric circuit

Advertisements

उत्तर

Fuse, MCB Switch

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2017-2018 (March) Set A

संबंधित प्रश्‍न

State two factors on which the electrical energy consumed by an electrical appliance depends.


An electric bulb is rated at 220 V, 100 W. What is its resistance?


An electric bulb is rated 250 W, 230 V. Calculate:

  1. the energy consumed in one hour
  2. the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.

A current passes through a resistor. Let K1 and K2 represent the average kinetic energy of the conduction electrons and the metal ions, respectively.


An immersion heater rated 1000 W, 220 V is used to heat 0.01 m3 of water. Assuming that the power is supplied at 220 V and 60% of the power supplied is used to heat the water, how long will it take to increase the temperature of the water from 15°C to 40°C?


Tick(✓) the correct choice in the following:
In the circuit shown in the following fig, the e.m.f. of the cell is 4 volts, the current
flowing through the resistor is


Define electric power. An electrical device of resistance R is connected across a source of voltage V and draws a current I. Derive an expression for power in terms of current and resistance.


How does earthing prevent electrical shock?


A student wants to use an electric heater, an electric bulb and an electric fan simultaneously.

How should these gadgets be connected with the mains? Justify your answer giving three reasons.


A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V Write Yes or No. Give supporting calculations to justify your answer.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×