Class 12th Physics Chapter 4 Objective In English

हमलोग Class 12th Physics Chapter 4 Objective In English | Moving Charges And Magnetism | Class 12 Physics Mcq In English के बारे स्टडी करेगे | Join Telegram For Fast Update :- Click Hare बोर्ड एग्जाम के लिए और अन्य स्टेट एग्जाम के लिए भी बहुत ही Important Objective Question पोस्ट किया गया है | आप सभी इस Objective Question को स्टडी करके अच्छे -अच्छे मार्क्स  लाने की प्रयाश करे | और इस एजुकेशन साईट के बारे में दोस्त को बतेये |

Class 12th Physics Chapter 4 Objective In English

1. Acurrent carrying coil is placed in a uniform magnetic field. If the coll turns through an angle O, then the torque is directly proportional to

• (A) sin θ
• (B) cos θ
• (C) cot θ
• (D) tan θ

2. The sensitivity of a tangent galvanometer can be increased by increasing

• (A) the radius of the coil
• (B) the external magnetic field
• (C) the number of turns of the coil
• (D) all of the above

3. The permeability of a paramagnetic substance is

• (A) very large
• (B) small but more than unity
• (C) less than unity
• (D) negative

4. Which of the following shows that the earth behaves as a magnet ?

• (A) Repulsion between like poles
• (B) Attraction between unlike poles
• (C) Null points in the magnetic field of a bar magnet
• (D) No existence of isolated magnetic poles

5. Circular loop of radius 0.0157 m carries a current 2A. The magnetic field at the centre of the loop is

• (A) 1.57 x 10^-3 Wb/m²
• (B) 8.0 x 10^-5 Wb/m²
• (C) 2.0 x 10^-3 Wb/m²
• (D) 3.14 x 10^-1 Wb/m2

6. What happens to the magnetic field at the centre of a circular current carrying coil if we double the radius of the coil keeping the current unchanged ?

• (A) halved
• (B) doubled
• (C) quadrupled
• (D) remains unchanged

7. The strength of the magnetic field around an infinite current carrying conductor is

• (A) same everywhere
• (B) inversely proportional to the distance
• (C) directly proportional to the distance
• (D) None

8. A current carrying power line carries current from west to east. Then the direction of the magnetic field 2 m above it is

• (A) west to east
• (B) south to north
• (C) north to south
• (D) none

9. Which of the following is not a unit of magnetic induction

• (A) gauss
• (B) tesla
• (C) oersted
• (D) weber/metre²

10. A wire of length 2 metre carries a current 1 ampere, is bent to form a circle. The magnetic moment of the coil is

• (A) 2π
• (B) π/2
• (C) π/4
• (D) 1/π

11. To convert galvanometer into voltmeter one should connect :

• (A) high resistance in series with galvanometer
• (B) low resistance in series with galvanometer
• (C) high resistance in parallel with galvanometer
• (D) low resistance in parallel with galvanometer

12. The most suitable metal for making permanent magnets is

• (A) iron
• (B) steel
• (C) copper
• (D) aluminium

13. The SI unit of magnetic dipole moment is

• (A) Ampere
• (B) Ampere metre²
• (C) Tesla
• (D) NONE

14. Earth’s magnetism was discovered by

• (A) Gauss
• (B) Oersted
• (C) Ampere
• (D) Gilbert

15. The magnetic moment per unit volume is called

• (A) magnetising field
• (B) magnetic induction
• (C) magnetisation
• (D) magnetic permeability

आशा करते है की पोस्ट दी गयी जानकारी अच्छा लगा होगा और कुछ  मदद मिला होगा | यदि किसी प्रकार की शिकायत या गलत आंसर या क्वेश्चन है तो हमें कमेंट करे बताये हम अगले पोस्ट में उस कमी को Solve करने की कोशिश करेगे | स्टडी से Releated की प्रकार के क्वेश्चन के लिए गूगल पर Search करे bihariacademy.com

Moving Charges And Magnetism In English