Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Net charge in a current-carrying conductor is
Always positive
Always negative
Zero
Either positive or negative
The audible frequency range of a human ear is?
20Hz to 200Hz
2Hz to 20Hz
200Hz to 2000Hz
20Hz to 20000Hz
Which one of the following is the resistance that must be placed parallel with 12 Ω resistances to obtain a combined resistance of 4 Ω?
2 Ω
4 Ω
6 Ω
8 Ω
An electric iron of resistance 20 Ω takes a current of 5 A. The heat development in 30 s is
1.5 × 104 J
0.4 × 104 J
3.5 × 104 J
2.4 × 104 J
A house is served by 220 V supply line in a circuit protected by a 9 ampere fuse. The maximum number of 60 W lamps in parallel that can be turned on, is
22
44
20
33
