Question 2 :
Fill the blank.<br>Voltmeter is always connected in . . . .with the device.
Question 3 :
A strong magnetic field is applied on a stationary electron. Then
Question 6 :
An electric iron uses a power of $1320 W$ when set to higher temperature. If set to lower temperature one third of higher temperature current is used. If iron is connected to a potential of $220 V$, then power used to lower temperature is _____ .
Question 7 :
Which among the following is not an electronic component used in constructing a toroid?
Question 8 :
In a current carrying conductor, if the direction of the field and that of the current are mutually perpendicular to each other, then the force acting on the conductor will be
Question 9 :
A long solenoid has magnetic field strength of $3.14\times 10^{-2}\ T$ inside it when a current of $5\ A$  passes through it. The number of turns in $1\ m$ length of the solenoid is<br/>
Question 11 :
When a straight wire is moved up and down rapidly between two poles of a horseshoe magnet then _______ is produced in the wire.
Question 13 :
Which of the following devices works on the principle ofelectromagnetic induction?
Question 15 :
A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is<br>
Question 20 :
Which rule determines the direction of force experienced by a current Carrying straight conductor placed in a magnetic field which is perpendicular to it.
Question 21 :
The current through a 60 W lamp rated for 250 V is
Question 22 :
A bulb marked $12 V$, $24 W$ operates $12$-volt battery for $20$ minutes. The current flowing through it is :
Question 23 :
The horizontal component of the Earth's magnetic field at a certain place is $3 \times 10^{-5}\ T$ and the direction of the field is from the geographic south to the geographic north. A very long straight conductor is carrying a steady current of  $1\ A.$ The force per unit length on it, when it is placed on a horizontal table and the direction of the current is east to west is :<br/>
Question 24 :
A wire carrying a current of 3 A is bent in the form of a parabola ${y}^{2}=4-x$ as shown in figure, where x and y are in metre.The wire is placed in a uniform magnetic field $\vec{B}=5\hat{k}$ tesla.The force acting on the wire is
Question 25 :
Two heaters A and B are in parallel across the supply voltage. Heater A produces $500 kJ$ in $20$ minutes and B produces $1000 kJ$ in $10$ minutes. The resistance of A is $100 \Omega$. If the same heaters are connected in series across the same voltage, the heat produced in $5$ minutes will be:
Question 26 :
Find the magnitude and direction of theforce vector applied to the loop if the vector $\vec{p}_m$ coincides in direction with the magnetic field produced by thecurrent $I$ at the point where the loop is located
