Solenoid Quiz 1

Question 1

Ram is having a huge basement in his house, in which he is performing an experiment on two long solenoids. Solenoid $$A$$ having number of turns per unit length equal to 1500 and magnetic induction of $$6.284	imes {{10}^{-4}}\,T$$ and solenoid $$B$$ having number of turns per unit length is 2500 and magnetic induction of $$12.568	imes {{10}^{-4}}\,T$$. The ratio of current in the solenoid $$A$$ to solenoid $$B$$ will be

Accepted Answer

$$\dfrac{5}{6}$$

Answer

$$\dfrac{6}{5}$$

Answer

$$\dfrac{2}{5}$$

Answer

$$\dfrac{5}{2}$$

Question 2

A man went to buy some solenoids where he had a choice to select different type of solenoids with different windings on it so he selected a solenoid of $$5$$ layer of windings of $$450$$ turns each of them and another one with $$8$$ layer of windings of $$700$$ turns each. Solenoids carry current of $$10\,A$$ and $$5\,A$$, now he wants to calculate the magnetic induction on the center of both solenoids along its axis. The magnetic induction calculated by man will be equal to-

Accepted Answer

$$2.82	imes {{10}^{-2}}\,T,3.51	imes {{10}^{-2}}\,T$$

Answer

$$6.61	imes {{10}^{-3}}\,T,1.56	imes {{10}^{-2}}\,T$$

Answer

$$9.3	imes {{10}^{-3}}\,T,2.15	imes {{10}^{-3}}\,T$$

Answer

$$4.52	imes {{10}^{-2}}\,T,1.11	imes {{10}^{-2}}\,T$$

Question 3

In a given circuit the current flowing through the $$3\Omega $$ resistor is same as the current in a solenoid of number of turns per unit length $$700$$ and having a magnetic field of $$1.2	imes {{10}^{-3}}\,T$$. The magnitude of apply voltage will approximately equal to–<img  src="https://cmds-vedantu.s3.ap-southeast-1.amazonaws.com/prod/question-sets/a3a3f44e-4c20-4eee-89ae-47a027fdfb111141441926028709108.png"/>

Accepted Answer

123 V

Answer

80.5 V

Answer

100 V

Answer

112 V

Question 4

Ram is standing on the center of the very long solenoid and experiences a magnetic induction $$B$$. Now he started walking towards one of the ends of the solenoid where he can observe some change in magnetic induction in the solenoid at that point. The percentage decrease in magnetic induction will be-

Accepted Answer

50%

Answer

70 %

Answer

40 %

Answer

90 %

Question 5

In a laboratory practical assignment with solenoids a student observes the magnetic induction as $$6.2	imes {{10}^{-3}}\,T$$, but in this assignment students need to increase the magnetic field produced by solenoid and to achieve that solenoid is filled with iron medium with relative permeability of $$1250$$. The new magnetic induction will be equal to-

Accepted Answer

7.750 T

Answer

9.250 T

Answer

3.2 T

Answer

4.12 T