1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by each pole of the magnet, the length of the magnet will be
A
MB/F
B
BF/M
C
MF/B
D
F/MB
2
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
3
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
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
An electromagnetic wave of frequency $$\upsilon = 3.0$$ MHz passes from vaccum into a dielectric medium with relative permittivity $${{\varepsilon _r}}$$ = 4.0. Then
A
Wavelength is doubled and frequency becomes half.
B
Wavelength is halved and frequency remains unchanged.
C
Wavelength and frequency both remain unchanged.
D
Wavelength is doubled and frequency unchanged.
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