A 100 turn coil of area 0.1 m2 rotates at half a revolution per second. It is placed in a uniform magnetic field of 0.01 T perpendicular to the axis of rotation of the coil. Calculate the maximum voltage generated in the coil?

Adithya peddles a stationary bicycle the pedals of which are attached to a 500 turn coil of area 11 m2. The coil rotates at half a revolution per second and it is placed in a uniform magnetic field of 20.5 T perpendicular to the axis of rotation of the coil. What is the maximum voltage generated in the coil?

A

354035 V

B

85000V

C

111647 V

D

46464 V

A lady wants to buy the following items in the given price range- 1. Tomato between Rs. 40 and Rs. 45 per kg. 2. Grapes in the price range of Rs. 80 and Rs. 90 per kg. 3. Milk packets at Rs. 23 per liter. In which shop from the following will she definitely get all her items/ A. Shop S sells tomato at Rs. 22.5 per half kg, Grapes at Rs. 82 per kg and milk at Rs. 24 per liter. B. Shop H sells grapes at Rs. 21 per quarter kg, milk at 12.5 per half litre and tomato at Rs. 22 per half kg. C. Shop O sells milk at Rs. 11.5 per half litre, tomato at 21 per half kg and grapes at Rs. 43 per half kg. D. Shop P sells tomato at Rs. 23.5 per half kg, grapes at Rs. 85 per kg and milk at Rs. 23 per litre.

A

B

D

C

B

D

C

A current carrying coil having magnetic moment M is placed in a magnetic field B. Initially the magnetic field is perpendicular to the plane of the coil and then coil turned about an axis such that the angle between the magnetic field and the plane of the coil become zero. Then choose the correct statement.

A

The initial torque on the coil was maximum.

B

The final torque on the coil was maximum.

C

Initial potential energy of the coil was zero.

D

All are correct.

A rigid body is rotating about an axis. One force F1 acts on the body such that its vector passes through the axis of rotation. Another force F2 acts on it such that it is perpendicular to the axis of rotation and at a point 5cm from the axis. This force F2 is perpendicular to the radius vector at its point of application. Find the net torque on the body. Let F1 = 10N & F2= 5N.

A

0

B

10.25Nm

C

0.25Nm

D

10Nm

How many per cent of employees get salaries less than Rs 30,000? The following data shows the salaries of all the employees of a company. Salary (In Rs.) 0-10,000 10,001-20,000 20,001-30,000 30,001-40,000 40,001-50,000 Number of Employees 235 105 50 40 20

A

0.756

B

0.78

C

0.867

D

0.72

Consider the following square with the four corners and the center marked as P, Q, R, S and T respectively. Let X, Y and Z represent the following operations: X: rotation of the square by 180 degree with respect to the S-Q axis. Y: rotation of the square by 180 degree with respect to the P-R axis. Z: rotation of the square by 90 degree clockwise with respect to the axis perpendicular, going into the screen and passing through the point T. Consider the following three distinct sequences of operation (which are applied in the left to right order). (1) XYZZ (2) XY (3) ZZZZ Which one of the following statements is correct as per the information provided above?

A

The sequence of operations (1) and (2) are equivalent

B

The sequence of operations (1) and (3) are equivalent

C

The sequence of operations (2) and (3) are equivalent

D

The sequence of operations (1), (2) and (3) are equivalent

A circular coil is suspended in a uniform magnetic field of induction 7 × 10¯⁵ T whose radius is 16 cm and it has 80 turns that carries 6 A current. Calculate the torque acting on the circular coil when the plane of the coil is 45° normal with the magnetic field.

A

4.5 × 10¯³ Nm

B

2.6 × 10¯³ Nm

C

1.9 × 10¯³ Nm

D

5.8 × 10¯³ Nm

In an AC generator, a coil with N turns, all of the same area A and total resistance R, rotates with frequency ω in a magnetic field B. The maximum value of e.m.f generated in the coil is

A

NABRω

B

NBAω

C

NAB

D

NARB

A circular current carrying loop is placed in a uniform magnetic field of magnitude B. The angle between the plane perpendicular to the coil and the magnetic field is θ. The current in the loop is I. Then the torque on the circular loop will be-

A

B I A cosθ

B

B I A sinθ

C

B I A cosθ/2

D

B I A sinθ/2

A rectangular current carrying loop is placed in a uniform magnetic field of magnitude B. The angle between the plane perpendicular to the coil and the magnetic field is θ. The current in the loop is I. Then the torque on the rectangular loop will be-

A

B I A cosθ

B

B I A sinθ

C

B I A cosθ/2

D

B I A sinθ/2

A 100 turn coil of area 0.1 m2 rotates at half a revolution per second. It is placed in a uniform magnetic field of 0.01 T perpendicular to the axis of rotation of the coil. Calculate the maximum voltage generated in the coil?

Related Questions