CUET LEVEL II NEET Mock Test 8 (Physics)

Ask square conducting loop of side length L carries a current I the magnetic field at the centre of the loop is

• Independent of L

• Proportional to L²

• Inversely proportional to L

• Linearly proportional to L

A long solenoid having 200 turns cm and carries current time magnetic field at its axis 6.28×10^-2 wb/m2 an another solenoid having 100 turns cm and carries i/3 current then magnetic field at its Axis will be

• 1.05×10^-4 /wb/m²

• 1.05×10^-2wwb /m²

• 1.05× 10^-5wb/m^-2

• 1.05× 10^-3wb/m²

Fallowing figure shows the path of an electron that passes through to region containing uniform magnetic field of magnitudes be on antibiot to eat bath in each Re gion is a half circle choose the correct option

• B1is into the page and it is stronger than B2

• B1 is into the page and it is weak than B2

• B1 is out of the page and it is weaker than B2

• B1 is out of the page and it is stronger than B2

Electron of kinetic energy of 7.2× 10¹⁸j is revolving on circular path in magnetic field 9× 10^-5 wb/m2 then radius of its circular path is

• 1.25cm

• 2.5m

• 2.5cm

• 25.0cm

To charge particle having charges Q1 and Q2 and masses M1 and M2 are projected with same velocity is region of uniform magnetic field they fellow the trajectory as shown in figure this we can conclude that

• Q1>q2

• Q1<q2

• M1<m2

• None of these

Same current I=2a is flowing in a wire frame as shown in the figure the frame is a combination of two equilateral triangle ACD and CD of side 1m it is placed in uniform magnetic field B =40 acting perpendicular to the plane of frame the magnitude of magnetic force acting on the fame is

• 24 n

• 0

• 16n

• 8n

Two concentric coplaner coils of terms N1 and N2 have radii ratio 2 : 1 respectively equal current in both the coils flows in opposite direction if net magnetic field is zero at their common Centre then n1:n2 is

• 2:1

• 1:2

• 1:1

• 4:1

Magnetic needle laying parallel to a magnetic field request w unit of work to turn it through 60 ⁰ the dark needed to maintain the needle in this position will be

• √3w

• W

• (√3/2) w

• 2w

Magnetic north pole of the earth the value of horizontal component angle of dip

• H=0 and 0=45⁰

• H=0and o=90^o

• H=0 and o=0⁰

• H=40⁰ nd o=45⁰

The core CVT of a small magnet where the ferromagnetics Demagnetized is 3×10³ a-m-1 the current required to be passed in solenoid of length 10 cm and number of terms 100 so that the magnet gets demagnetics when inside the solenoid is

• 3A

• 6A

• 30ma

• 60 mA