Test Details

Test-3

Nov 11, 6:00 PM

60 minutes

Nov 11, 7:00 PM

30.0 marks

MCQ

30 questions

Prateek Singh

Simplified Teacher

Class Details

Physics

Class -12

Physics

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Question Text

Question 1 :
Complete the following statements with an appropriate word / term to be filled in the blank space(s). Magnetic field lines emerge from the _________ pole of a solenoid or a permanent magnet.

Question 2 :
The sensitivity of a moving coil galvanometer increases with the decrease in

Question 3 :
For an ideal toroid, in which turns are closely spaced, the external magnetic field is

Question 6 :
If electron is not deflected in passing through a certain region of space, then

Question 7 :
An 8 cm long wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. If the magnetic field inside the solenoid is 0.3 T, then magnetic force on the wire is

Question 8 :
In which  form  the field lines inside the infinite solenoid are present ?

Question 9 :
Choose the correct statement from the following: The strength of a solenoid can be increased by increasing the number of turns. The magnetic field due to a solenoid is similar to the magnetic field produced by a bar magnet.

Question 10 :
The gyro-magnetic ratio of an electron in an H-atom, according to Bohr's model, is

Question 11 :
A device used for detecting small currents due to changing magnetic field is known as:

Question 12 :
Which rule is used to find the direction of magnetic field in a toroid?

Question 13 :
Two straight parallel wires carrying current in the opposite directions repel each other, because of

Question 14 :
Which of the following is likely to have the largest resistance?

Question 15 :
In a cyclotron, If a deuteron can gain an energy of 40 MeV, then a proton can an energy of:

Question 16 :
Assertion: The coil is bound over the metallic frame in moving coil galvanometer. Reason: The metallic frame helps in making steady deflection without any oscillation.

Question 17 :
The force of repulsion between two parallel wires is $f$ when each one of them carries a certain current I. If the current in each is doubled, the force between them would be

Question 19 :
If a velocity has both perpendicular and parallel components while moving through a magnetic field, what is the path followed by a charged particle?

Question 20 :
A galvanometer of resistance $50\Omega $ is connected to a battery of $3 V$ along with a resistance of $2950\Omega $ in series shown, full-scale deflection of $30$ divisions. The additional series resistance required to reduce the deflection to $20$ divisions is

Question 21 :
When a solenoid is activated, the force that moves the plunger is

Question 22 :
Which of the following expressions are applicable to the moving coil galvanometer?

Question 23 :
A long solenoid is formed by the winding $20\ turns/cm$. What will be the current necessary to produce a magnetic field of $20\ millitesla$ inside the solenoid? ($\dfrac { { \mu }_{ 0 } }{ 4\pi } ={ 10 }^{ -7 }tesla\quad -meter/ampere$)

Question 24 :
Assertion: The magnetic field at the ends of a very long current carrying solenoid is half of that at the centre. Reason: If the solenoid is sufficiently long, the field within it is uniform.

Question 26 :
A current I is passed through a solenoid of n turns per unit length. What is the magnetic filed inside the solenoid ?

Question 28 :
The relation between voltage sensitivity $\sigma _{v}$ and the current sensitivity $\sigma _{i}$ of a moving coil galvanometer is (Given that $G$ is the resistance of the galvanometer)

Question 29 :
If a galvanometer is shunted then among the following not true one is

Question 30 :
Why does a current carrying freely suspended solenoid rest along a particular direction?

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