If electron of velocity  is subjected to a magnetic field  , then

1.  Speed will change

2.  Direction will change

3.  Both (1) and (2)

4.  None of the above

Concept Questions :-

Lorentz force
High Yielding Test Series + Question Bank - NEET 2020

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.

2.

3.

4.

Concept Questions :-

Magnetic field due to various cases
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The unit of reduction factor of the tangent galvanometer is

(1) Ampere

(2) Gauss

(4) None of these

Concept Questions :-

Moving coil galvanometer
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The resistance of 1 A ammeter is 0.018 Ω. To convert it into 10 A ammeter, the shunt resistance required will be :

(1) 0.18 Ω

(2) 0.0018 Ω

(3) 0.002 Ω

(4) 0.12 Ω

Concept Questions :-

Conversion to ammeter and voltmeter
High Yielding Test Series + Question Bank - NEET 2020

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

Concept Questions :-

Conversion to ammeter and voltmeter
High Yielding Test Series + Question Bank - NEET 2020

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

Concept Questions :-

Conversion to ammeter and voltmeter
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A galvanometer can be used as a voltmeter by connecting a :

(1) High resistance in series

(2) Low resistance in series

(3) High resistance in parallel

(4) Low resistance in parallel

Concept Questions :-

Conversion to ammeter and voltmeter
High Yielding Test Series + Question Bank - NEET 2020

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) $\left(n-1\right)G$

(3) $\frac{G}{n}$

(4) $\frac{G}{\left(n-1\right)}$

Concept Questions :-

Conversion to ammeter and voltmeter
High Yielding Test Series + Question Bank - NEET 2020

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

Concept Questions :-

Conversion to ammeter and voltmeter
High Yielding Test Series + Question Bank - NEET 2020

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

Concept Questions :-

Conversion to ammeter and voltmeter