1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
The primary of a transformer when connected to a dc battery of 10 Volt draws a current of 1 mA. The number of turns of the primary and secondary windings are 50 and 100 respectively. The voltage in the secondary and the current drawn by the circuit in the secondary are respectively
A
20 V and 2.0 mA
B
10 V and 0.5 mA
C
Zero volt and therefore no current
D
20 V and 0.5 mA
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
A current of 2.5 A flows through a coil of inductance 5 H. The magnetic flux linked with the coil is
A
0.5 Wb
B
12.5 Wb
C
zero
D
2 Wb
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is
A
four times per revoluation
B
six times per revolution
C
once per revolution
D
twice per revolution
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when
A
a capacitance of reactance XC = XL is included in the same citcuit.
B
an iron rod is inserted in the coil.
C
frequency of the AC source is decreased.
D
number of turns in the coil is reduced.
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