Magnetic Effects of Current and Magnetism (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 58 - 61 of 155
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Question number: 58
» Magnetic Effects of Current and Magnetism » Current Loop as Magnetic Dipole
Question
The magnetic moment of a current carrying circular coil is
Choices
| Choice (4) | Response | |
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| a. | Directly proportional to the square of the length of the wire |
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| b. | Directly proportional to the length of the wire |
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| c. | Inversely proportional to the length of the wire |
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| d. | Inversely proportional to the square of the length of the wire |
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Question number: 59
» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field
Question
A particle of mass m and charge q moves with a constant velocity v along the positive x direction. It enters a region containing a uniform magnetic field B directed along the negative z direction, extending from x = a to x = b. The minimum value of v required so that the particle can just enter the region x < b is
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Question number: 60
» Magnetic Effects of Current and Magnetism » Current Loop as Magnetic Dipole
Question
A circular loop of area 0.01m 2 carrying a current of 10 A, is held perpendicular to a magnetic field of intensity 0.1 T. The torque acting on the loop is
Choices
| Choice (4) | Response | |
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| a. | Zero |
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| b. | 0.8 Nm |
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| c. | 0.01 Nm |
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| d. | 0.001 Nm |
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Question number: 61
» Magnetic Effects of Current and Magnetism » Current Loop as Magnetic Dipole
Question
Four wires each of length 2.0 meter are bent into four loops P, Q, R and S and then suspended into uniform magnetic field. Same current is passed in each loop. Which statements are incorrect?
Four Current Carrying Loops P, Q, R and S.
Four wires each of length 2.0 meter are bent into four loops P, Q, R and S. loop S is the circularly shaped.
(1) Couple on loop P will be the highest
(2) Couple on loop Q will be the highest
(3) Couple on loop R will be the highest
(4) Couple on loop S will be the highest
Select the correct answers and mark it according to the following codes:
Choices
| Choice (4) | Response | |
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| a. | 2 and 4 are correct |
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| b. | 1, 2 and 3 are correct |
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| c. | 1 and 2 are correct |
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| d. | 1 and 3 are correct |
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