Advertisements
Advertisements
प्रश्न
Observe the following diagram and choose the correct alternative:
विकल्प
The intensity of magnetic field in A is larger than in B.
The intensity of magnetic field in B is less than in A.
The intensity of magnetic field A and B is same.
The intensity of magnetic field in A is less than in B.
Advertisements
उत्तर
The intensity of magnetic field in A is less than in B.
Explanation:
Magnetic field produced due to closed loop
`vec"B" ⇒ vec"B" ∝ "I"`
In diagram (A), I = `5/("R"_1 + "R"_2)`
In diagram (B), I = `5/((("R"_1 "R"_2))/("R"_1 + "R"_2))`
IB > IA so `vec"B"_"B" > vec"B"_"A"`
∴ The intensity of magnetic field in A is less than in B.
APPEARS IN
संबंधित प्रश्न
An electric bell has an electromagnet.
Fill in the following blank with suitable words:
If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a ........... pole.
What is Maxwell's corkscrew rule? For what purpose is if used?
Name one device which works on the magnetic effect of current.
When the switch S is closed in the figure given below, the pointer of the galvanometer moves to the right.
If S is kept closed, will the pointer:
(a) return to zero?
(b) stay over on the right?
(c) move to the left and stay there
(d) move to and fro until S is opened
If fuse of 250 mA, 500 mA, 1 A, 5 A and 10 A were available, which one would be the most suitable for protecting an amplifier rated at 240 V, 180 W?
How should the electric lamps in a building be connected so that the switching on or off in a room has no effect on other lamps in the same building?
Name any two appliances which works on the phenomenon of magnetic effect of electric current.
Explain the magnetic field created around a straight current carrying conductor with the help of a diagram.
A soft iron bar is introduced inside the current-carrying solenoid. The magnetic field inside the solenoid ____________.
A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure. In the field an electron and a proton move as shown. The electron and the proton experience
Magnetic effect of current was discovered by ______.
Boojho made an electromagnet by winding 50 turns of wire over an iron screw. Paheli also made an electromagnet by winding 100 turns over a similar iron screw. Which electromagnet will attract more pins? Give reason.
______ are also used to remove splinters of steel or iron in hospitals dealing with eye injuries.
Edison used a ______ wire coil is a vacuum glass and discovered the first electric bulb in 1879.
What do you mean by the magnetic effect?
What are MCBs? How do they work?
The figure given below shows the magnetic field around the conductor. Study it and answer the questions:
- What changes are caused by increasing current?
- What do you see when the magnetic needle is kept a little away from the wire?
- In the second part of the figure, the iron filings arrange themselves in a circular manner around the wire. Why does this happen?
A rectangular loop ABCD carrying a current I is situated near a straight conductor XY, such that the conductor is parallel to the side AB of the loop and is in the plane of the loop. If a steady current I is established in the conductor as shown, the conductor XY will ______.
