1
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The majority charge carriers in a p-type semiconductors are
A
free electrons
B
conduction electrons
C
ions
D
holes
2
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The ionisation energy of hydrogen atom in the ground state is
A
13.6 Mev
B
13.6 eV
C
13.6 J
D
zero
3
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following devices changes low voltage alternating current to high voltage alternating current and vice-versa?
A
Generator
B
Motor
C
Transformer
D
Vibrator
4
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
An optical illusion which occurs mainly in deserts during hot summer is based on the principle of
A
reflection
B
interference
C
dispersion
D
total internal reflection
Questions Asked from Marks 2.5