Q). A wire having 10 ohm resistance cut into four parts each of equal length. The resistance of each part of wire is ……………………ohm.
A) 40
B) 14
C) 2.5
D) 0
Q). 10 resistors each having 100 ohm resistance are connected in parallel. Find equivalent resistance in ohm.
A) 1000
B) 110
C) 100
D) 10
Q). Applying Kirchhoff current law to Junction ‘C’ the value of Y -X = ………. Ampere.
A) 20
B) 10
C) 8
D) 0
Q). Within the solenoid magnetic lines of forces ……………………..
A) Pass from South pole to North pole
B) Pass from North pole to South pole
C) North to South and South to North
D) Does not pass
Q). When a current passes through a straight conductor, magnetic field surrounding conductor will be…………….
A) straight lines
B) parabola
C) closed circles
D) hyperbola
Q). If a charge ‘q’ having mass ”m” moves Perpendicular to magnetic induction field ‘B’ with velocity ‘v’ then, the radius of circular path of moving charge……………………
A) mv/ Bq
B) Bq / mv
C) mvBq
D) 0
Q). In electric motor, current direction in coil is changed by ………………….
A) Two magnets
B) Two slip rings
C) One Brush one slip ring
D) None
Q). When a current carrying straight conductor of length 2 m, moves perpendicular to magnetic induction field strength of 2 Tesla with velocity 10 m/ s, find e.m.f., induced in volts.
A) 4000
B) 1000
C) 400
D) 40
Q). Security Checking Alarm works on which principle?
A) Newton
B) Lenz
C) Electromagnetic induction
D) Ohm
Q). An A.C. generator is provided with …………… slip rings.
A) one
B) two
C) three
D) zero