हिंदी

The ‘live’ and the ‘neutral’ wires have potential difference of _______.

Advertisements
Advertisements

प्रश्न

The ‘live’ and the ‘neutral’ wires have potential difference of _______.

विकल्प

  • 110 V

  • 202 V

  • 201 V

  • 220 V

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

The ‘live’ and the ‘neutral’ wires have potential difference of 220 V.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Effects of electric current - Choose the correct option. [पृष्ठ ४]

APPEARS IN

एससीईआरटी महाराष्ट्र Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
अध्याय 4 Effects of electric current
Choose the correct option. | Q 2. | पृष्ठ ४

संबंधित प्रश्न

Why is the tungsten used almost exclusively for filament of electric lamps?


Name any two effects of electric current.


An electric kettle rated at 220 V, 2.2 kW, works for 3 hours. Find the energy consumed and the current drawn.


Why does the connecting cord of an electric heater not glow hot while the heating element does?


A resistance of 25 Ω is connected to a 12 V battery. Calculate the heat energy in joules generated per minute.


The current passing through a room heater has been halved. What will happen to the heat produced by it?


The current passing through an electric kettle has been doubled. The heat produced will become:

(a) half
(b) double
(c) four time
(d) one-fourth 


The heat produced in a wire of resistance 'x' when a current 'y' flows through it in time 'z' is given by:

(a) x2 × y × z
(b) x × z × y2
(c) y × z2 × x
(d) y × z × x 


If the current flowing through a fixed resistor is halved, the heat produced in it will become:


Give Scientific reason.

In practice, the unit kWh is used for the measurement of electrical energy, rather than joule.


Heat energy is being produced in a resistance in a circuit at the rate of 100 W. The current of 3 A is flowing in the circuit. What must be the value of the resistance?


Statement 1 : Electric current ( flow of electrons ) creates heat in the resistor.
Statement 2 : Heat in the resistor is created according to the rule of energy conservation.
Explain Statement 1 with the help of Statement 2.


In an electric bulb, coil of _______ metal is used.


Which of the following substance contracts on heating?


Which metal is used to make the filament of an electric bulb?


What is overloading?


Write two devices based on the heating effect of electric current.


Name any two appliances which works on the phenomenon of heating effect of electric current.


When does overloading occur?


Explain the application of heating effect of electric current in an electric bulb with a diagram.


Define fuse.


Which of the following is correct?


Why is parallel arrangement used in domestic wiring?


What is Joule’s heating effect? How can it be demonstrated experimentally? List its four applications in daily life.


When a switch is in OFF position,

  1. circuit starting from the positive terminal of the cell stops at the switch.
  2. circuit is open.
  3. no current flows through it.
  4. current flows after some time. 

Choose the combination of correct answer from the following.


What are the factors affecting heating effect of electric current?


Name the effect of the current responsible for the glow of the bulb in an electrical circuit.


What is a trip switch?


Define the following:

Electrolyte


Tara, after completing her exams, went to her grandmother's house along with her younger brother Rahul. One day, Rahul came home after playing and switched on the fan and air conditioner. At the same time, his grandmother was preparing a milkshake for him using a mixer. Suddenly, they heard a big sound and the electricity of the house got shut down. Tara is called an electrician. He said the main reason for supply to shut down was overloading.

  1. What is overloading?
  2. Is overloading and short the same? When does short-circuiting take place?
  3. How can the effects of overloading be avoided?

Find the odd one out.


Two students decided to investigate the effect of water and air on iron object under identical experimental conditions. They measured the mass of each object before placing it partially immersed in 10 ml of water. After a few days, the object were removed, dried and their masses were measured. The table shows their results.

Student Object Mass of Object
before Rusting in g
Mass of the coated
object in g
A Nail 3.0 3.15
B Thin plate 6.0 6.33

What might be the reason for the varied observations of the two students?


An electric iron of resistance 20 Ω draws a current of 5 A. The heat developed in the iron in 30 seconds is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×