A closed-loop (of any shape) carrying current is lying in the x-y plane. A uniform magnetic field B is present in the region such that the loop experiences zero force :

1.  B acts along the x-axis

2.  B acts along the y-axis

3.  B acts along the z-axis

4.  B can act along any of the above direction for the net force to be zero

 

Subtopic:  Current Carrying Loop: Force & Torque |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


A galvanometer of resistance 240Ω allows only 4% of the main current after connecting a shunt resistance. The value of shunt resistance is :

1.  10Ω

2.  20Ω

3.  8Ω

4.  5Ω

Subtopic:  Moving Coil Galvanometer |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


The dots in the figure show a magnetic field perpendicular to the plane of the paper and coming out of it. The curve ABC shows the trajectory of a particle in the plane of the paper. What is a particle?

                                        

1.  Proton

2.  Electron

3.  Neutron

4.  It cannot be predicted

Subtopic:  Lorentz Force |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


A long solenoid has 800 turns per meter length of the solenoid. A current of 1.6 A flows through it. The magnetic induction at the end of the solenoid on its axis is:

1.  16×10-4 T

2.  8×10-4 T

3.  32×10-4 T

4.  4×10-4 T

Subtopic:  Magnetic Field due to various cases |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


The unit of reduction factor of the tangent galvanometer is 

(1) Ampere

(2) Gauss

(3) Radian

(4) None of these

Subtopic:  Moving Coil Galvanometer |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


In order to pass 10% of the main current through a moving coil galvanometer of 99 ohms, the resistance of the required shunt is :

(1) 9.9 Ω

(2) 10 Ω

(3) 11 Ω

(4) 9 Ω

Subtopic:  Conversion to Ammeter & Voltmeter |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


When a 12 Ω resistor is connected in parallel with a moving coil galvanometer then its deflection reduces from 50 divisions to 10 divisions. The resistance of the galvanometer is :

(1) 24 Ω

(2) 36 Ω

(3) 48 Ω

(4) 60 Ω

Subtopic:  Moving Coil Galvanometer |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


A voltmeter has a resistance of G ohms and range V volts. The value of resistance used in series to convert it into a voltmeter of range nV volts is :

(1) nG

(2) (n1)G

(3) Gn 

(4) G(n1)

Subtopic:  Conversion to Ammeter & Voltmeter |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


Which of the following statement is wrong:

(1) Voltmeter should have high resistance

(2) Ammeter should have low resistance

(3) Ammeter is placed in parallel across the conductor in a circuit

(4) Voltmeter is placed in parallel across the conductor in a circuit

Subtopic:  Conversion to Ammeter & Voltmeter |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:


A moving coil galvanometer has a resistance of 50 Ωand gives full scale deflection for 10 mA. How could it be converted into an ammeter with a full scale deflection for 1A :

(1) 50/99 Ω in series

(2) 50/99 Ω in parallel

(3) 0.01 Ω in series

(4) 0.01 Ω in parallel

Subtopic:  Conversion to Ammeter & Voltmeter |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level: