1
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
A DC generator works on the principle of
A
Ohm’s law 
B
Joule’s law of heating
C
Faraday’s laws of electromagnetic induction
D
None of the above
2
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
The presence of magnetic field can be determined using which one of the following instruments?
A
Ammeter
B
Voltmeter
C
Magnetic needle
D
Motor
3
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following statements about speed and velocity is correct?
A
Speed and velocity both are vector quantities.
B
Speed and velocity both are scalar quantities.
C
Speed is vector quantity and velocity is scalar quantity.
D
Speed is scalar quantity and velocity is vector quantity. 
4
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Two convex lenses have focal lengths of 50 cm and 25 cm, respectively. If these two lenses are placed in contact, then the net power of this combination will be equal to
A
+2 dioptre
B
+6 dioptre
C
-6 dioptre 
D
+3 dioptre
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12