Magnetic Effects of Current and Magnetism [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 5 - 9 of 246
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Question 5
Question MCQ▾
A short bar magnet is placed with its north pole pointing south. The neutral point is 10 cm away from the center of the magnet. If H = 0.4 gauss, calculate magnetic moment of the magnet.
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.2Am2 | |
b. | lAm2 | |
c. | 0.1 Am2 | |
d. | 2Am2 |
Question 6
Question Assertion-Reason▾
Assertion(Ꭺ)
We cannot think of magnetic field configuration with three poles.
Reason(Ꭱ)
A bar magnet does not exert a torque on itself due to its own field.
Choices
Choice (4) | Response | |
---|---|---|
a. | Both Ꭺ and Ꭱ are false | |
b. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ | |
c. | Ꭺ is true but Ꭱ is false | |
d. | Ꭺ is false but Ꭱ is true |
Question 7
Question MCQ▾
In the hysteresis cycle, the value of H needed to make the intensity of magnetization zero is called
Choices
Choice (4) | Response | |
---|---|---|
a. | Retentivity | |
b. | Coercive force | |
c. | None | |
d. | Lorentz force |
Question 8
Question MCQ▾
Which of these particles in motion is not affected by magnetic field B?
Choices
Choice (4) | Response | |
---|---|---|
a. | α-particle | |
b. | neutron | |
c. | Electron | |
d. | proton |
Question 9
Question Assertion-Reason▾
Assertion(Ꭺ)
Cyclotron does not accelerate electron.
Reason(Ꭱ)
Mass of the electron is very small.
Choices
Choice (4) | Response | |
---|---|---|
a. | Ꭺ is true but Ꭱ is false | |
b. | Both Ꭺ and Ꭱ are false | |
c. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ | |
d. | Ꭺ is false but Ꭱ is true |