Normal type of MCQ with one correct option
A coil of inductance 8.4 mH and resistance 6( is connected to a 12V battery. The current in the coil is 1.0 A at approximately the time
500 s
20 s
35 ms
1 ms
Normal type of MCQ with one correct option
A coil having n turns and resistance R ohm is connected with a galvanometer of resistance 4R ohm. This combination is moved in a region where magnetic flux changes from W1 weber to W2 weber in t second. The induced current in the circuit is
Normal type of MCQ with one correct option
A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 rad s(1. If the horizontal component of earth’s magnetic field is 0.2 ×10(4 T, the emf developed between the ends of the conductor is
5 (V
50 (V
5 mV
50 Mv
Normal type of MCQ with one correct option
In a uniform magnetic field B, a wire in the form of a semicircle r rotates about the diameter of the circle with an angular frequency (. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R, the mean power generated period of rotation is
Normal type of MCQ with one correct option
Magnitude of induced emf produced in a coil when q magnet is inserted into it depends on the (A) Number of turns in the coil (B) Resistance of the coil (C) Magnetic moment of the magnet (D) Speed of approach of the magnet
A,B
B
C,D
A,C & D
/
Current
Product of current
Product of inductance and current
Product of inductance and change in current.
/
1A
2 A
4 A
8 A
/
A straight line
A parabola
A hyperbola
Exponential
/
Both A and R are true and R is correct explanation of A
Both A and R are true and R is not correct explanation of A
A is true, R is false
A is false, R is true
Match matrix type of questions,
Column I
S.I unit of inductance the henry can be matched as: (A) Weber divided by (B) Volt-second divided by (C) Joule divided by (D) Ohm multiplied by
ColumnII
(P) Joule (Q) Second (R) Ampere2 (S) Ampere
(A) ((S) , (B) ((R). (C) ((R). (D) ((R).
(A) ((R) , (B) ((S). (C) ((S). (D) ((Q).
(A) ((Q) , (B) ((S). (C) ((R). (D) ((S).
(A) ((S) , (B) ((S). (C) ((R). (D) ((Q).