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Magnetic Effects of Current Test Online MCQs

Test Name Magnetic Effects of Current MCQs Test
Subject Physics
Test Type MCQs
Total Question 15
Total Marks 30
Total Time 15 Mints
Test Help For
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Get information about Magnetic force and its effects on current in Magnetic Effects of Current MCQs Test Online. Attempt all questions to prepare for the engineering colleges & universities and medical colleges & universities admission tests. Magnetic Effects of Current Test Online MCQs being uploaded below.

Magnetic Effects of Current Test Online MCQs

Physics

1. According to Lenz’s law there is a conversion of:

 

Question 1 of 15

2. A proton and an α-particle, moving with the same velocity, enter a uniform magnetic field, acting normal to the plane of their motion. The ratio of the radii of the circular paths described by the proton and α-particle is:

 

Question 2 of 15

3. The magnetic moment of current (I) carrying circular coil of radius (r) and number of turns (n) varies as:

 

Question 3 of 15

4. The earth’s magnetic field at a given point is 0.5 x 10⁻⁵ Wb m⁻². This field is to be annulled by magnetic induction at the center of a circular conducting loop of radius 5.0 cm. the current required to be flown in the loop is nearly

 

Question 4 of 15

5. Cyclotron is used to accelerate:

 

Question 5 of 15

6. An electron is travelling along the x-direction. It encounters a magnetic field in the y-direction. Its subsequent motion will be:

 

Question 6 of 15

7. A coil of copper having 1000 turns is placed in a magnetic field (B=4 x 10⁻⁵) perpendicular to its axis. The cross sectional area of eh coil is 0.05 m². If it turns through 180° in 0.01 second, then the e.m.f. induced in the coil will be:

 

Question 7 of 15

8. Two concentric coils each of radius equal to 2π cm are placed at right angles to each other. 3 ampere and 4 ampere are the currents flowing in each coil respectively. The magnetic induction in Weber/m² at the center of the coils will be (μ₀ = 4π x 10⁻⁷ Wb/A.m)

 

Question 8 of 15

9. The cyclotron frequency of an electrons gyrating in a magnetic field of 1 T is approximately:

 

Question 9 of 15

10. Two parallel beams of positrons moving in the same direction will:

 

Question 10 of 15

11. What is the magnetic field at a distance R from a coil of radius r carrying current I?

 

Question 11 of 15

12. A conducting ring of radius 1 meter is placed in an uniform magnetic field B of 0.01 teals oscillating with frequency 100 Hz with its plane at right angle to B. what will be the induced electric field?

 

Question 12 of 15

13. Electron of mass m and charge q is travelling with a speed along a circular path of radius r at right angles to a uniform magnetic field of intensity B. If the speed of the electron is doubled and the magnetic field is halved the resulting path would have a radius

 

Question 13 of 15

14. What should be amount of current through the rings of radius of 5 cm so that field at the center equal to the earth’s magnetic field of 7 x 10⁻⁵ Wb/ m², is

 

Question 14 of 15

15. A 50 turn circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field B is increased from 0.10 T in 2 milli second, the average induced emf will be:

 

Question 15 of 15


 

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