Advertisements
Advertisements
प्रश्न
How much is the potential difference between live and neutral wires?
Advertisements
उत्तर
The potential difference between live and neutral wires is around 220 V.
APPEARS IN
संबंधित प्रश्न
Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the 12 Ω resistors. What would be the readings in the ammeter and the voltmeter?
What do the following symbols mean in circuit diagrams?

What do the following symbols mean in circuit diagrams?

Draw circuit symbols for
a cell
What is a circuit diagram
Explain with the help of a labelled circuit diagram how you will find the resistance of a combination of three resistors, or resistance R1, R2 and R3, joined in parallel. Also mention how you will connect the ammeter and the voltmeter in the circuit when measuring the current in the circuit and the potential difference across one of the three resistors of the combination.
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric motor
Who will spend more electrical energy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins?
Observe the following figure which bulb get fuse?

The accompanying figure shows some electrical appliances connected in a circuit in a house. Answer the following questions.

- By which method are the appliances connected?
- What must be the potential difference across individual appliances?
- Will the current passing through each appliance be the same? Justify your answer.
- Why are the domestic appliances connected in this way?
- If the T.V. stops working, will the other appliances also stop working? Explain your answer.
What is open circuit?
In any electric circuit, when the switch is on and the current flows through it why do the wire, switches, bulb or devices become hot?
The unit of electrical power is _______.
What is the potential difference?
Flow of electricity through a closed circuit is _____.
In the given circuit diagram, which of the given switch(s) should be closed. So that only bulb A glows.

Draw the circuit diagram for the series connection.
In the circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit ______.

Higher Order Question
A student made a circuit by using an electric cell, a switch, a torch bulb (fitted in the bulb holder), and copper connecting wires. When he turned on the switch, the torch bulb did not glow at all. The student checked the circuit and found that all the wire connections were tight.
- What could be the possible reason for the torch bulb not glowing even when the circuit appears to be complete?
Draw the circuit diagram for the following series connection

Study the electric circuit below. Which of the following switches should be closed so that only two bulbs will light up

Which of the following a simple circuit must-have?
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
What is electric circuit?
The wiring in a house consists of ______ circuits.
Instead of metal wires, a jute string can be used to make a circuit.
What are the types of electric circuits?
In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be
Three bulbs A, B, C are connected in a circuit as shown in the following figure. When the switch is ‘ON’

Name the device used these days in place of electric fuses in electrical circuits.
Our body is a ______ of electricity.
The ______ is a species of fish that can give electric shocks of up to six hundred fifty watts of electricity.
Overloading of electric circuits can lead to short-circuiting.
Name the device which is used to measure the strength of the electric current in an electric circuit.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
