12th Grade > Physics
MAGNETIC FORCE MCQs
Total Questions : 15
| Page 2 of 2 pages
Answer: Option A. -> 14
:
A
→B||→V42=y3=z−6y=6,z=−12→B=4^i+6^j−12^k,B=√42+62+122B=√196=14
:
A
→B||→V42=y3=z−6y=6,z=−12→B=4^i+6^j−12^k,B=√42+62+122B=√196=14
Answer: Option A. -> 1 MeV
:
A
By using r=√2mKqB; r→ same, B→ same ⇒K∝q2m
Hence KαKp=(qαqp)2×mpmα=(2qpqp)2×mp4mp=1⇒Kα=Kp=1MeV.
:
A
By using r=√2mKqB; r→ same, B→ same ⇒K∝q2m
Hence KαKp=(qαqp)2×mpmα=(2qpqp)2×mp4mp=1⇒Kα=Kp=1MeV.
Answer: Option A. -> 16.8×10−12(+^k)N
:
A
⃗F=q(⃗V×⃗B)=1.6×10−19[3×107^i]×[2^i+4^j]=1.6×10−19×3×107×4^k⃗F=16.8×10−12^k
:
A
⃗F=q(⃗V×⃗B)=1.6×10−19[3×107^i]×[2^i+4^j]=1.6×10−19×3×107×4^k⃗F=16.8×10−12^k
Answer: Option C. -> All ions deflect towards – y direction
:
C
As the electric field is switched on, positive ion will start to move along positive x-direction and negative ion along negative x-direction. Current associated with motion of both types of ions is along positive x-direction. According to Flemings left hand rule or right hand thumb rule, force on both types of ions will be along negative y-direction
:
C
As the electric field is switched on, positive ion will start to move along positive x-direction and negative ion along negative x-direction. Current associated with motion of both types of ions is along positive x-direction. According to Flemings left hand rule or right hand thumb rule, force on both types of ions will be along negative y-direction
Latest Videos
Latest Test Papers
Login With Google
Old way of Login
Login With Email