Advertisements
Advertisements
प्रश्न
Increasing the current passing through the wire decreases the magnetic field intensity.
विकल्प
Right
Wrong
Advertisements
उत्तर
Increasing the current passing through the wire decreases the magnetic field intensity- Wrong
APPEARS IN
संबंधित प्रश्न
Draw circuit symbols for
fixed resistance
Draw circuit symbols for
a battery of three cells
How does the short circuit form? What is its effect?
Who will spend more electrical energy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins?
Find the odd one out and justify it.
Fuse wire, M.C.B., Rubber Gloves, Generator
Resistances R1, R2, R3 and R4 are connected as shown in the figure. S1 and S2 are two keys. Discuss the current flowing in the circuit in the following cases.

- Both S1 and S2 are closed.
- Both S1 and S2 are open.
- S1 is closed but S2 is open.
A battery is to be formed by joining 3 dry cells with connecting wires. Show how will you connect the wires by drawing a diagram.
Distinguish between a closed circuit and an open circuit, with the use of suitable labelled diagrams.
Answer the following question.
With the help of a suitable circuit diagram prove that the reciprocal of the equivalent resistance of a group of resistances joined in parallel is equal to the sum of the reciprocals of the individual resistances.
Draw a neat diagram showing a closed electric circuit.
Name the instrument used to control current in an electric circuit.
Explain the following:
Closed 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?
Nowadays MCBs are used in homes, for stop the current in the circuit which suddenly increases.
Write scientific reason.
It is beneficial to carry electrical energy in AC form as it is carried over long distances.
Tabulate the different components of an electric circuit and their respective symbols.
Three bulbs are connected end to end from the battery. This connection is called _______.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
What is electric circuit?
In a simple circuit, why does the bulb glow when you close the switch?
Explain about domestic electric circuits. (circuit diagram not required)
A child has drawn the electric circuit to study Ohm’s law as shown in Figure. His teacher told that the circuit diagram needs correction. Study the circuit diagram and redraw it after making all corrections.

In an electric circuit, the current starts from ______.
Choose the statement which is not correct in the case of an electric fuse.
In an electric circuit a fuse is a ______ ______ to prevent possible fire.
Draw the symbols of the following circuit components.
Switch in off position
The ______ is a species of fish that can give electric shocks of up to six hundred fifty watts of electricity.
In the following arrangement shown in the following figure, the bulb will not glow if the ends A and B are connected with

Will the bulb glow in the circuit shown in the following figure? Explain.

Boojho has a cell and a single piece of connecting wire. Without cutting the wire in two, will he be able to make the bulb glow? Explain with the help of a circuit diagram.
Write a short note on the different electrical circuits.
An electric motor rated 1100 W is connected to 220 V mains. Find:
- The current drawn from the mains,
- Electric energy consumed if the motor is used for 5 hours daily for 6 days.
- Total cost of energy consumed if the rate of one unit is 5.
