NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics: Questions 556 - 559 of 5119
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Question 556
Question MCQ▾
A bicycle wheel of radius 0.5 m has 32 spokes. It is rotating at the rate of 120 revolutions per minute, perpendicular to the horizontal component of earth՚s magnetic field BH = 4 × 10-5 tesla. The emf induced between the rim and the center of the wheel will be,
Choices
Choice (4) | Response | |
---|---|---|
a. | 6.28 × 10-5 V | |
b. | 1.6 × 10-5 V | |
c. | 4.8 × 10-5 V | |
d. | 6.0 × 10-5 V |
Question 557
Question MCQ▾
The sensitivity of a moving coil galvanometer can be increased by
(1) Decreasing the couple per unit twist of the suspension
(2) Increasing the number of turns in the coil
(3) Decreasing the area of the coil
(4) Decreasing the magnetic field
Select the correct answers and mark it according to the following codes:
Choices
Choice (4) | Response | |
---|---|---|
a. | 2 and 4 are correct | |
b. | 1,2 and 3 are correct | |
c. | 1 and 2 are correct | |
d. | 1 and 3 are correct |
Question 558
Question MCQ▾
What is the net force on the square coil?
Choices
Choice (4) | Response | |
---|---|---|
a. | 25 × 10-7 N towards wire | |
b. | 35 × 10-7 N away from wire | |
c. | 35 × 10-7 N towards wire | |
d. | 25 × 10-7 N away from wire |
Question 559
Question MCQ▾
A diamagnetic material in a magnetic field moves
Choices
Choice (4) | Response | |
---|---|---|
a. | From stronger to the weaker parts of the field | |
b. | From weaker to the stronger parts of the field | |
c. | None | |
d. | Perpendicular to the field |