Electricity and Magnetism (Part - 2) - TRB Physics Study Materials

SI NO.	QUESTIONS	ANSWERS
1.	Current ‘j’is equal to ?	q/t
2.	The direction of electric current is opposite to the direction of?	Electron flow
3.	The velocity with which free electrons get drifted towards the positive terminal when an electric field is applied is called?	Drift velocity
4.	The potential meter is used to measure the?	Potential
5.	The difference of potentials between the two terminals of a cell in a n open circuit is called?	Emf
6.	The unit of electric energy is?	Joule
7.	The electrode towards which positive ions travels is called?	Cathode
8.	The cell from which the electric energy is derived by irreversible chemical actions are called?	Primary cell
9.	The advantage of secondary cell is that they are ?	Rechargeable
10.	The emf of lead acid accumulator is?	2.2 volt
11.	When two resistances are in parallel, the effective resistance is?	4
12.	The chemical process of obtaining current from a secondary cell is called?	Discharge
13.	The thermo emf developed in the seebeck effect is because of difference between?	Two junctions
14.	Peltier effect is converse of?	See beck effect
15.	Sb, Ag, Zn, Cd these metals are examples of?	Positive Thomson effect
16.	Thermopile works on the principle of?	See beck effect
17.	Tangent galvanometer is used to measuring the?	Current
18.	Biot-Savart law expressed in alternate way is called?	Ampere’s circuital law
19.	If the conductor is placed perpendicular to the magnetic field, the conductor experiences?	Maximum force
20	The construction of a moving coil ballistic galvanometer is similar to that of?	Dead beat galvanometer
21	The another name for generator is?	Alternator
22	Dead bed galvanometer is working with the help of ?	Eddy current
23	Step down transformer decreases the voltage by?	Increasing the current
24	Eddy current loss can be minimized by using?	Stelloy
25	The emf introduced in the coil varies in magnitude and direction periodically is called?	Alternating emf