The d.c generator has essentially the same components as the a.c generator except the presence of?
slip-ring
carbon brushes
split ring
armature
Correct answer is C
To correct and A.C generator with a D.C generator the slip ring is replaced with split-ring communicator
0.96 kWh
19.2 kWh
9.60 kWh
1.92 kWh
Correct answer is B
Energy consumed = power x time
= (60 W x 10 + 40 W x 5) x 24 h
= (600 W + 200 W ) x 24 h
= 800 W x 24h = 19200 w h
= 19.2 kWh
11:1
1:11
12:11
11:12
Correct answer is A
Power supplied = I\(^2\) R = 20\(^2\) X 1 = 400 W
Power dissipated = IV = 20 X 220 = 4400 W
(Power supplied)/Power dissipated = 4400 W / 400 W
= 11 / 1 or 11 : 1
A short chain is sometimes attached to the back of a petrol tanker to?
generate more friction
ensure the balancing of the tanker
caution the driver when overspeeding
conduct excess charges to the earth
Correct answer is D
The friction between the tanker and air creates charges which the chain conducts to the ground.
Short sightedness can be corrected by what type of lens?
Concave lens
Convex lens
Converging lens
Mirrors
Correct answer is A
Shortsightedness is corrected using a concave (curved inwards) lens which is placed in front of a myopic eye