ECAT Pre Computer Science Chapter 14 MCQ Test With Answer

Top Scorers Of ECAT Physics Chapter 14 Electromagnetism MCQ`s Test

Sr.#	Question	Answer
1	The sources of magnetic field are	A. isolated magnetic poles B. charges at rest C. charges in motion D. none of these
2	The force experienced by an electron projected in a magnetic field B with a velocity V is given by	A. F=e(V x B) B. F= -e(V x B) C. F= e(B x V) D. Both a and c
3	When some compass needles are placed on a card board along a circle with the center at the wire, they will	A. Point the direction of N-S B. Set themselves tangential to the circle C. Point in the direction of E-W D. None of these
4	When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is	A. 90° B. 75° C. 0° D. 180°
5	Amperean path is a:	A. Closed path B. Rectangular path C. Circular path D. Any of above
6	Total number of turns on 0.15 m length solenoid is 300. the value of n is:	A. Greater than 300 B. Smaller than 300 C. Equal to 300 D. Any of (A) or (B)
7	Magnetic induction is also called as:	A. Ampere’s law B. Faraday’s law C. Lenz’s law D. Newton’s law
8	Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:	A. Maximum B. Minimum C. Zero D. Very small
9	The direction of lines of force depends upon the direction of	A. voltage B. current C. charges D. none of these
10	if the field is directed along the normal to the area, then flux is:	A. Maximum B. Equal to zero C. Equal to BA D. Minimum