Question 1 :
Why does a current carrying freely suspended solenoid rest along a particular direction?

Question 3 :
The restoring couple in the moving coil galvanometer is due to<br/>

Question 5 :
In a current-carrying solenoid, the magnetic field direction is given by the right hand rule such that the

Question 6 :
If the current is doubled, the deflection is also doubled in

Question 7 :
A large solenoid of windings of 400 turns per meter carries a current 5A. The magnetic field at the centre of the solenoid is about:

Question 8 :
<b></b>The magnetic field in such a toroid can be obtained using

Question 9 :
In cyclotron, for a given magnet, radius of the semicircle traced by positive ion is directly proportional to ($v=$ velocity of positive ion).<br/>

Question 13 :
In ballistic galvanometer, the frame on which the coil is wound is non-metallic to:

Question 14 :
If 6 mm is the distance moved by the thimble on the main scale for 6 rotations then pitch of the screw is :<br>

Question 15 :
For an ideal toroid, in which turns are closely spaced, the external magnetic field is

Question 16 :
The gyro-magnetic ratio of an electron in an H-atom, according to Bohr's model, is

Question 17 :
If a galvanometer is shunted then among the&#160;following not true one is<br/>

Question 18 :
A cubical region of space is filled with some uniform electric and magnetic fields. An electron enters the cube across one of its faces with velocity v, and a positron enters via opposite face with velocity -v. At this instant.

Question 19 :
The sensitiveness of a moving coil galvanometercan be increased by decreasing<br>

Question 20 :
<strong>A galvanometer in series with a high resistance is called </strong><br>

Question 22 :
For a heater rated at $4 \ &#160;kW$; $220 \ &#160;V$ . Calculate&#160;the resistance of the heater element.

Question 23 :
Rate at which electric work is done is called as ?<br/>

Question 24 :
When n number identical cell of emf E and internal resistanceis connected in parallel, the net emf of the system will be <br>

Question 25 :
Calculate the power of a source if it produces an energy of 250 joules in 10 sec.

Question 26 :
________ represents the mostsignificant digitsof the resistance value in finding the resistance of carbon resistor.

Question 27 :
The current in a circuit with an external resistance of $3.75\Omega$ is $0.5\ A$. When a resistance of $1\Omega$ is introduced into the circuit, the current becomes $0.4\ A$. The emf of the power source is

Question 28 :
Assertion (A) : Meterbridge wire is made up of manganin.<br/>Reason (R) :&#160; The temperature coeffiecient of resistance is very small for manganin.<br/><br/>

Question 30 :
If the emf of the cell in the primary circuit is doubled, with out changing the cell in the secondary circuit, the balancing length is<br/>

Question 31 :
What is the maximum resistance one can make with ten $1 \Omega$ resistors?

Question 32 :
The potential gradient along the length of a uniform wire is $10$ volt/m B and C are two points at $30$ cm and $60$ cm in a scale fitted along the wire. The pd between B and C is<br>

Question 34 :
Match list - I with List - II<br/>List - I &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; List - II<br/>a) Thermistor &#160; &#160; &#160;e) High positive $\alpha $<br/>b) Carbon &#160; &#160; &#160; &#160; &#160; &#160;f)&#160;$\alpha $&#160;almost zero<br/>c) Nichrome &#160; &#160; &#160; &#160;g) either positive or&#160;negative&#160;$\alpha $<br/>d) Constantan &#160; &#160;&#160;h) Negative&#160;$\alpha $<br/>manganin<br/>

Question 37 :
A wire of resistance R is elongated n-fold to make a new uniform wire. The resistance of new wire

Question 38 :
In the 5 band color resistor,which color bands are considered as significant digits?

Question 40 :
Consider the following two statements:<br>(A) Kirchhoff's Junction Law follows from conservation of charge.<br>(B) Kirchhoff's Loop Law follows from conservative nature of electric field.<br>